AQMx Sectoral Guidance: Improving Fuel Quality

Transport fuels remain a major source of greenhouse gases (GHGs), short-lived climate pollutants (SLCPs), and criteria air pollutants (UNEP/CCAC, 2025). Fuel sulfur content plays a decisive role in determining both the emission intensity of combustion and the effectiveness of modern emission-control technologies such as diesel particulate filters (DPFs) and selective catalytic reduction (SCR) systems (ICCT, 2020; Yue et al., 2015). High-sulfur fuels disable these systems and lock countries into outdated, high-emission vehicle technologies. Consequently, fuel quality is not merely a technical specification—it is a foundational policy lever for air-quality improvement, climate mitigation, and regulatory alignment with cleaner vehicle standards (UNEP/CCAC, 2025).

As of January 2025, 115 countries had adopted low-sulfur diesel at ≤ 50 ppm, according to the UNEP-CCAC Global Low Sulfur Fuels, Cleaner Vehicles Progress Tracker (UNEP, 2025); many have already transitioned to ≤ 10 ppm. At the same time, it shows that some developing and transitional markets still allow diesel sulfur levels in the hundreds or even thousands of ppm, leaving clusters above 50 or 500 ppm in parts of Sub-Saharan Africa and South and Southeast Asia. The CCAC’s global strategy calls for the introduction of low-sulfur diesel fuels (50 ppm or less sulfur) by 2025 for those countries which have not yet done so, and most countries to reach 10 ppm fuels by 2030, underscoring both the progress to date and the remaining gap. Meanwhile, road-transport energy demand continues to rise: the International Energy Agency (IEA, 2025a, IEA, 2025b) reports that oil demand from road transport remains substantial despite early signs of electrification—making fuel-quality convergence a fundamental near-term measure while cleaner technologies scale up.

Upgrading to low-sulfur road fuels (≤ 10–15 ppm) is among the most cost-effective enabling policies for cleaner transport. It allows full compatibility with Euro 6/VI-equivalent vehicle technologies, ensures stable in-use emissions control, prevents high-sulfur fuel dumping, and aligns national fuel quality with imported vehicle requirements and inspection and maintenance (I/M) programs (ICCT, 2020; Yue et al., 2015; UNEP-CCAC, 2025). The proven policy pathway is to tighten fuel specifications (diesel and gasoline), establish robust quality-assurance and enforcement systems, and link these measures to modern vehicle-emission standards and in-use compliance frameworks. Countries that act early gain immediate air-quality and compliance benefits while building the foundation for long-term road-transport decarbonization (World Bank, 2025). 

The transport sector is a major contributor to global climate and air pollution. According to the Intergovernmental Panel on Climate Change (IPCC, 2022), transport activities across all modes account for roughly 15% of total greenhouse gas (GHG) emissions and about 23% of global energy-related CO₂ emissions. Within this sector, road transport is by far the dominant source, producing about 77% of transport-related CO₂ emissions—roughly 5.9 gigatons (Gt) in 2021—and representing around 11–18% of total global CO₂ emissions (IPCC, 2022; REN21, 2023; WRI, 2024).

Road transport is also a major emitter of short-lived climate pollutants (SLCPs), particularly black carbon from diesel engines used in freight and passenger vehicles. Updated inventories from the Community Emissions Data System (Hoesly et al., 2024) estimate that road transport contributes about 8% of global black-carbon emissions, underscoring its central role in near-term climate mitigation and air-quality improvement.

In addition, road vehicles emit nitrogen oxides (NOₓ), volatile organic compounds (VOCs), and carbon monoxide (CO)—key precursors of ozone and photochemical smog—as well as fine particulate matter (PM2.5), a major driver of urban air pollution and associated health impacts (Hoesly et al., 2024; Visualizing Energy, 2024; WHO, 2024). They also release other harmful pollutants, including sulfur dioxide (SO₂), ammonia (NH₃), and hazardous air pollutants such as benzene, formaldehyde, and polycyclic aromatic hydrocarbons. Road transport is additionally a significant source of greenhouse gases—including carbon dioxide (CO₂), methane (CH₄), and nitrous oxide (N₂O)—reinforcing its climate impact beyond traditional air-pollution pathways. 

These combined emissions degrade air quality, reduce visibility, and intensify both regional and global warming. Evidence from scientific and regulatory assessments shows that lowering diesel-fuel sulfur content from several hundred ppm to around 10 ppm can reduce tailpipe particulate emissions by up to 80% and contribute to meaningful reductions in nitrogen oxides (NOₓ), even before the implementation of advanced vehicle-emission standards (ICCT, 2020; Yue et al., 2015). By enabling efficient operation of advanced after-treatment systems and sharply decreasing black-carbon emissions, cleaner fuels remain one of the fastest and most cost-effective measures to improve air quality and deliver near-term climate benefits. 

Public health impacts

Transport emissions—particularly from road vehicles—are among the leading environmental risks to human health. Exposure to fine particulate matter (PM2.5), nitrogen oxides (NOₓ), ozone formed from NOₓ and volatile organic compounds (VOCs), and black carbon is linked to a wide range of diseases, including ischemic heart disease, stroke, chronic obstructive pulmonary disease (COPD), asthma, lung cancer, and lower respiratory infections. The World Health Organization (WHO, 2024) identifies ambient air pollution as one of the top global health threats, responsible for millions of premature deaths each year. Within this total, on-road vehicle emissions alone accounted for approximately 385,000 premature deaths in 2015 in one global estimate (ICCT, 2019), and an earlier analysis from World Bank/IHME found that motorized road transport is responsible for approximately 1.5 million deaths every year worldwide, including about 184,000 deaths caused specifically by air pollution from vehicle emissions, mainly due to cardiovascular and respiratory diseases linked to fine particulate matter (PM2.5) (World Bank, 2014). In total, the sector accounts for the loss of more than 80 million healthy years of life (DALYs) annually globally in 2010 (World Bank, 2014). Broader modeling by Silva et al. (2016) indicates that the transport sector contributes around 11–16% of global ambient-air-pollution mortality, confirming its major role in population exposure. Long-term exposure to traffic-related air pollution is also associated with increased hospital admissions, impaired lung function in children, and adverse birth outcomes, while emerging evidence links chronic exposure to diabetes, hypertension, and cognitive decline.

Agriculture and ecosystems impacts

Environmental consequences are equally severe. Ozone and particulate pollution reduce crop yields and impair vegetation growth, eroding food security and ecosystem services across agricultural regions (Mills et al., 2018). Black carbon and other short-lived climate pollutants accelerate glacier melting and regional warming, amplifying climate impacts beyond CO₂. In cities, transport-related pollution contributes to visibility loss, urban heat islands, and environmental degradation, disproportionately affecting vulnerable populations living near major roads or freight corridors. 

Economic impacts

The economic and social burden of transport-related air pollution is immense. Welfare losses from ambient air pollution are estimated at trillions of U.S. dollars annually; the World Bank (2016) values the global welfare loss and lost labor income at several percentage points of global GDP. In developing economies, the cost of inaction manifests in reduced worker productivity, increased public-health expenditure, and the disproportionate burden on low-income and marginalized communities that face higher exposure yet possess fewer mitigation options. 

The cumulative health, environmental, social, and economic impacts make transport emissions one of the most consequential cross-sectoral challenges for sustainable development—and underscore the urgency of coordinated policy action worldwide. 

Transitioning to ultra-low-sulfur fuels (≤ 5 ppm sulfur) generates immediate and sustained benefits for air quality, public health, climate, and the economy. 

Health benefits are immediate: reductions in PM₂․₅ exposure translate into fewer premature deaths, hospitalizations, and chronic respiratory illnesses. A study from ICCT showed that if all countries implemented Euro VI-equivalent standards supported by clean fuels with ≤ 10–15 ppm sulfur by 2030, global premature mortality from vehicle emissions would fall by about 75%, avoiding roughly 210,000 early deaths annually compared with business-as-usual trends (ICCT, 2013). A recent study (Jin et al.,2025) projects that strengthening vehicle emissions could prevent up to 1.9 million premature deaths by 2040, with the largest health gains in low- and middle-income countries. 

Clean-fuel programs also contribute to near-term climate-mitigation goals and strengthen national NDC implementation (UNEP/CCAC, 2025), by dramatically lowering black-carbon emissions. They equally enable advanced emission-control technologies—such as diesel particulate filters (DPF) and selective catalytic-reduction systems (SCR)—to operate effectively, cutting particulate matter (PM) and nitrogen oxides (NOₓ). Cleaner fuels also decrease maintenance costs, extend engine life, and improve fuel efficiency, generating net economic benefits that far exceed initial investments (World Bank, 2025).

At the regional level, harmonized low-sulfur standards foster fair trade, prevent the import or dumping of high-sulfur fuels, and reinforce the credibility of national regulatory systems. Clean-fuel transitions represent one of the highest-return policy measures for achieving simultaneous gains in health, climate, and economic performance. 

Scenario A: Local Data is Available

This scenario is designed for countries that have established monitoring and data collection infrastructure. It focuses on the direct use and verification of local data for precise policy calibration, robust enforcement, and accurate impact assessment. The "sources" in this scenario are the official, internal records and reports generated by the country's own regulatory and monitoring institutions.  

1: Fuel Quality and Supply Assessment  

The objective is to use verifiable local data to confirm fuel quality compliance at various points in the supply chain and ensure the integrity of the national standard.  

For a Fuel-Producing Country

Compile Refinery Compliance Reports issued by the Ministry of Energy or the National Oil Company, and Accredited Independent Laboratory Testing records of the fuel conducted at the refinery gate, major distribution terminals, and retail outlets. This data is used to directly verify the current sulfur content and other key parameters (e.g., octane/cetane number) against the national standard and the UNECE Recommendation on Fuel Quality (UNECE, 2019). The data allows for continuous monitoring of quality control processes and rapid identification of compliance failures within the domestic production network.

For a Fuel-Importing Country

Compile Customs Inspection Reports generated by the National Customs Authority and Accredited Third-Party Testing records of all imported fuel at the port of entry or border crossing. This provides a direct, verifiable measure of compliance with the national standard before the fuel enters the domestic distribution network. The data is used to track and audit the performance of individual importers and suppliers, allowing for targeted enforcement and the application of penalties for non-compliant shipments, thereby ensuring the integrity of the supply chain.

2: Vehicle Fleet Profile Assessment  

The objective is to precisely determine the on-road fleet's technology and compliance status using official records for accurate emissions modeling. Use Centralized Vehicle Registration Databases maintained by the Ministry of Transport or Department of Motor Vehicles, which link vehicle age, engine type, and emission standard (e.g., Euro I, II, V) to accurately model the fleet's technology mix. This is complemented by data from Mandatory Inspection and Maintenance (I/M) Programs, which provide a direct measure of the compliance rate of the in-use fleet and identify high-emitting vehicles for targeted action. This primary data is essential for precisely calibrating the benefits of the cleaner fuel transition and designing effective fleet renewal programs.  

3: Air Pollution Levels and Health Impact Assessment  

Use local, ground-based and standardized measurements to accurately assess the environmental and health situation for evidence-based policy. Compile data from the National Air Quality Monitoring Network (operated by the Environmental Protection Agency or Meteorological Service) for ambient concentrations of key traffic pollutants (PM2.5, NO₂, SO₂ and black carbon when available) across urban centers. This high-resolution local data can be used to calculate the actual health burden based on local population exposure and health statistics provided by the Ministry of Health or National Bureau of Statistics, providing a precise measure against the WHO Air Quality Guidelines (WHO, 2021). The local data is critical for informing local policy decisions, prioritizing interventions in the most affected areas, and accurately communicating health risks to the public.  

4: Road Transport's Contribution Assessment  

The objective is to precisely attribute the air pollution problem to the road transport sector for targeted regulatory action. Use the national or local Emissions Inventory (EI) that is based on locally-derived activity data (e.g., Vehicle Kilometers Traveled - VKT) and locally-derived Emission Factors (EFs), often calibrated through local testing programs. Conduct a benchmark of source apportionment studies using local air quality data and chemical fingerprinting to precisely determine the contribution of road transport to ambient concentrations, providing the scientific foundation for regulatory action and calibration of transport-specific policies. 

Scenario B: Local Data is Not Available

 1. Fuel Quality and Supply Assessment

The objective is to determine the likely sulfur content and upgrade feasibility using indirect but credible evidence. In the absence of direct sampling data, regulatory standards and regional harmonization frameworks serve as proxy indicators for national policy design. Their adoption ensures technical credibility, facilitates trade, and prevents market fragmentation. Equally important are regional blocs’ harmonized specifications, which reduce cross-border discrepancies and strengthen collective enforcement.

What to evaluate:

• Official sulfur limits for diesel and gasoline (ppm).
• Maximum aromatic, benzene, and oxygenate content.
• Presence of lead or metallic additives.
• Consistency with international reference standards.
• Individual refining capacity, and their diesel and gasoline quality outputs (S500, S50, S10).
• Share of refined versus imported fuels.
• Import sources (countries, refineries, or trading hubs).
• Blending and distribution practices that may alter sulfur or aromatic content.
• Regional or cross-border harmonization mechanisms (e.g., ECOWAS, EAC, ASEAN). 

Key regulatory references and frameworks:

• EU Fuel Quality Directive 98/70/EC (as amended by 2009/30/EC): Establishes binding fuel-quality requirements for all EU Member States. Limits sulfur in both gasoline and diesel to a maximum of 10 ppm (mg/kg). Ensures compatibility with Euro 5–6 vehicle standards and supports reduced air pollution.
• EN 590 (diesel) and EN 228 (gasoline): Harmonized European fuel standards directly implementing the EU Fuel Quality Directive. Specify sulfur content ≤10 ppm for both diesel and gasoline fuels sold across Europe. Ensure uniform quality and emission-system compatibility within the EU single market.
• EU Industrial Emissions Directive 2010/75/EU: Regulates emissions from refineries and other major industrial sources. Requires implementation of Best Available Techniques (BAT) for desulfurization and SO₂ reduction at the production stage. Ensures refinery operations meet strict EU environmental performance standards but does not set a direct sulfur ppm limit for fuels.
• ASTM D975 (diesel) and ASTM D4814 (gasoline): Provide US technical specifications for automotive fuels. Define Ultra-Low Sulfur Diesel (ULSD) with a maximum sulfur limit of 15 ppm; gasoline typically ≤30 ppm (regulated under EPA Tier 3). Serve as industrial benchmarks for consistent fuel performance and emission control compliance.
• ECOWAS Harmonized Regional Specifications for Fuels (2022): Adopted by West African countries to harmonize regional fuel standards. Sets a maximum sulfur limit of 50 ppm for both gasoline and diesel fuels. Includes joint import control mechanisms to prevent high-sulfur dumping from external suppliers.
• EAC Fuel Standards (EAS 177:2019, diesel) (EAS 158:2019, gasoline): Applies to all East African Community member states. Mandates a sulfur limit of 50 ppm in both diesel and gasoline. Supports clean-vehicle technology adoption and harmonized cross-border enforcement.
• ASEAN Fuel Economy Roadmap (2021): ASEAN has no binding regional fuel-quality regulation; instead, the ASEAN Fuel Economy Roadmap encourages voluntary alignment with Euro 4/5 standards (≤ 50 ppm sulfur, aiming for 10 ppm). Enforcement rests with national laws. Singapore mandates 10 ppm sulfur for all fuels, and Thailand adopted Euro 5 diesel (10 ppm) in 2024. Philippines and Vietnam both enforce 50 ppm sulfur fuels (Euro 4), while Indonesia and Cambodia still allow higher-sulfur grades but are transitioning downward. 

Useful analytical platforms

• DieselNet – Fuel Regulations Database: A comprehensive online database of national and regional fuel-quality standards worldwide. Includes explicit sulfur limits for each country and tracks regulatory timelines. Widely used by policymakers and researchers to assess global progress toward ultra-low-sulfur fuels (≤10–50 ppm).
• TranspolicyNet – Policy Regulations Database: Global platform covering transport-related regulations and policy frameworks. Focuses on broader issues such as fuel economy, electrification, and emissions standards. Provides contextual insight into how fuel-quality regulations integrate with national decarbonization policies.
• UNEP / PCFV Global Sulphur Progress Tracker: Maps sulfur limits in fuels globally. Classifies countries by their official maximum sulfur content (from 10 ppm to >5000 ppm). Monitors global convergence toward ultra-low-sulfur fuels in support of cleaner air and climate goals.
• IEA Oil Information & Refining Database: Global IEA datasets with country refinery profiles, process-unit capacities (e.g., hydrotreaters/hydrocrackers), and time-series utilization. Supports benchmarking desulfurization capability and tracking upgrades relevant to low-sulfur fuels. Subscription access; highly granular and regularly updated.
• ARDA (African Refiners & Distributors Association): Regional industry body publishing Africa-focused refinery maps, clean-fuel roadmaps, and upgrade/status reports. Covers import dependence, timelines toward 50/10-ppm fuels, and policy/enforcement challenges. Useful for on-the-ground context, project pipelines, and stakeholder contacts across the continent.
• OPEC Annual Statistical Bulletin: Open annual compendium of refinery throughputs, capacities, product balances, and trade flows (members and selected non-members). Strong for macro supply-demand trends and cross-country comparisons; less granular on individual desulfurization units. Good citation for historical time series and regional market context. 

For a Fuel-Producing Country

In this scenario, the primary concern is the technical capacity and cost of upgrading domestic infrastructure. Since direct testing data may be unavailable, the baseline assessment must focus on industrial proxies. The most powerful proxy is the Refinery Technology Profile which involves identifying the age and type of the refinery’s desulfurization units (particularly the presence and condition of hydrodesulfurization - HDS). This proxy provides a strong estimate of likely current fuel-sulfur levels and helps to approximate the required capital expenditure (CAPEX) to achieve compliance. However, it should be complemented by information on hydrogen capacity, feedstock quality, and operational readiness. 

For a Fuel-Importing Country

For importing nations, the challenge is regulatory control over the supply chain, as the quality of the fuel is determined by the source market. The primary proxy assessment must therefore be split based on the mode of import:  

• Maritime/Port-Based Imports: 
  The primary proxy is Source Port Standards, which involves identifying the main international trading hubs or the country of origin supplying the fuel. The mandated quality standards of these source markets are used as the expected minimum quality of imported fuel. 
  A well-documented case from the Netherlands illustrates proactive regulatory progress: fuel exports from Dutch ports—Amsterdam, Rotterdam, and Antwerp—are now subject to stricter quality controls. Following the Netherlands Human Environment and Transport Inspectorate (ILT)’s 2023 policy, all exported fuels must meet cleaner standards aligned with international health and environmental goals. 

• Transboundary Land-Based Imports (Pipeline, Rail, Road Tanker): 
  In regions like Africa and Asia, fuel is often transported across borders from a neighboring country that acts as a producer or regional hub. In these cases, the key proxy becomes the neighboring country’s fuel standards and enforcement performance. Regulators must identify the official fuel specifications of the supplying country and, importantly, assess how well those standards are enforced to estimate the risk of non-compliant fuel entering the market. This is the same case when multiple fuels qualities are available in the market, as dirtier cheaper fuels can be exported as cleaner and more expensive option. Some countries require the use of dyes to differentiate the quality of their exported fuels. This is particularly relevant for land-locked countries.

  For example, for land-locked Nepal, refined petroleum imports come almost entirely from neighboring India via road tankers, making India’s fuel-specification regime and enforcement record a key proxy for Nepal’s fuel-quality risk (Shrestha, 2019). 

  In Africa, the same pattern is evident where multiple land-locked nations (e.g., Uganda, Rwanda, and Malawi) depend on imported fuels shipped from coastal neighbors like Kenya, Tanzania, and Mozambique. The quality and enforcement of these source markets directly affect inland fuel quality and compliance (ICCT, 2017). 

  The ECOWAS Policy Rule on fuel quality for exports provides a model for how importing regions can demand cleaner fuel from international suppliers, and the East African Community (EAC) Model (Environmental Compliance Institute (ECI), 2017) demonstrates the success of transboundary agreements in harmonizing low-sulfur standards across multiple nations, including those that are landlocked. However, whenever possible, countries should establish fuel-testing programs or targeted sampling campaigns. Universities and research institutions can often provide these services at moderate cost, testing samples from local fuel stations to generate reliable data. 

2: Vehicle Fleet Profile Assessment  

The objective is to estimate the fleet's age and technology level, which dictates the emission benefits of cleaner fuel. When centralized data is lacking, the assessment can rely on two main proxies. The first is import data analysis, which uses customs and trade data (by year and country of origin) to estimate the fleet's average age and its likely emission standard (e.g., vehicles from Japan or the EU are likely compliant with Euro-equivalent standards). The second is visual surveys and scrappage rates, involving rapid, low-cost street-side surveys in major cities to estimate the proportion of older, high-emitting vehicles, and using international models to estimate vehicle scrappage rates based on economic indicators. The US EPA Toolkit for Cleaner Fuels and Vehicles provides practical guidance, and the UNECE World Forum for Harmonization of Vehicle Regulations (WP.29) offers the global framework for vehicle standards against which the fleet can be classified.  

3: Air Pollution Levels and Health Impacts

The objective is to quantify the co-benefits of cleaner fuels by estimating the current air quality and associated health burden, focusing on key traffic-related pollutants like NOₓ, SO₂, PM, and Black Carbon (BC). The lack of a national or local air quality monitoring network can be overcome by leveraging global data, for instance from global air pollution maps, like the UNEP/IQAir platform. It can also involve using satellite data for PM2.5 and NO₂ concentrations over major urban centers. Reliable sources include NASA Earthdata, NASA MODIS Satellite data and the European Space Agency (ESA) TROPOMI Satellite Data. This environmental data is complemented by the WHO Air pollution data portal and the State of Global Air report and database, which provide country-level estimates of air pollution exposure and related mortality/morbidity. The World Bank/OECD Health Impact Valuation Models can be used to assign an economic value to the estimated health burden, strengthening the policy's economic justification (World Bank, 2016; OECD, 2016). 

AQMx Guidance on Air Quality Monitoring

AQMx Guidance on Health Impact Assessment

4. Road Transport's Contribution

The contribution of road transport to urban air pollution can be estimated using global emission inventories and comparable regional studies. The Community Emissions Data System (CEDS) and EDGAR databases provide consistent, sector-specific emission estimates that help quantify transport-related PM2.5, NOₓ, and CO emissions where local data are limited. Emission modeling frameworks such as COPERT and MOVES offer validated methodologies for estimating emissions by vehicle type and fuel, aligned with international best practices. The AERMOD dispersion model can then be applied to simulate the spatial distribution and ambient concentrations of pollutants arising from these estimated transport emissions, supporting exposure and impact assessments.

Evidence from UNEP/CCAC (2018) and World Bank (2011) source apportionment studies suggests that road transport typically contributes 20–40% of urban PM₂.₅ in comparable cities, with higher shares where older diesel fleets and low fuel standards prevail.

AQMx Guidance on Emission Inventories

AQMx Guidance on Source Attribution

Core Institutional Actions (Universal)

These actions establish the necessary legal and political foundation for the reform:

• Map Mandates and Legal Instruments: Conduct a thorough review of existing legislation to identify overlaps or gaps in authority. Clarify responsibilities for fuel-specification drafting, certification, enforcement, and reporting. Where mandates conflict, formalize roles using Memoranda of Understanding (MoUs) or Cabinet Resolutions to ensure a unified legal front.
• Institutionalize Coordination: Embed the central coordination mechanism (e.g., a Clean Fuels Task Force) within an existing high-level inter-ministerial platform—such as a National Climate Council or Clean Air Committee—to secure political visibility and enable alignment with international donor and development bank support.
• Convene Broad Stakeholders: Beyond government agencies, include essential non-governmental actors: Academia for independent analysis, NGOs and Consumer Groups for public oversight and communication support, and Development Partners for technical and financial alignment. 

Differentiated Strategy: Producer vs. Importer

The composition and primary focus of the Clean Fuels Task Force must reflect the country's main implementation challenge.

For a Fuel-Producing Country

The focus of the coordination mechanism is on industrial planning, investment, enforcement, and supply chain stability.

• Create a Clean Fuels Task Force with Industrial Focus: 

  The inter-ministerial body should be jointly chaired by the Ministry of Energy/Petroleum and the Ministry of Finance/Planning. The Ministry of Environment and Health plays a supporting role in setting environmental and health targets.

  For fuel-producing countries, a phased approach may be appropriate. Where domestic refineries are still producing higher-sulfur fuels, countries may consider an interim target of 50 ppm while refinery-upgrade plans are implemented. This transitional level is generally most effective when paired with a clear, time-bound pathway—typically around 12 to 18 months—to progress toward the final 10–15 ppm standard

• Include Essential Institutions:

  National Oil Company/Refinery Management: These actors are central, as the roadmap is contingent on their investment and technical timeline.

  Development Banks/Financiers: Direct engagement is necessary to secure the large-scale capital expenditure (CAPEX) required for refinery upgrades.

  Standards Bureaus / Metrology Institutes: Key for defining the new fuel-quality parameters and verifying the refinery's output compliance. 

Key Coordination Focus: The Task Force's primary role is to align the financial incentives with the refinery upgrade milestones, ensuring that the domestic producer meets the regulatory deadline without compromising national fuel supply security. 

For a Fuel-Importing Country

The focus of the coordination mechanism is on regulatory enforcement, border control, and trade harmonization.

• Create a Clean Fuels Task Force with focus on regulations and enforcement:

  The inter-ministerial body should be jointly chaired by the Customs Authority/Ministry of Trade and the Ministry of Environment/Health. The Ministry of Energy plays a supporting role in monitoring global market pricing.

  For fuel-importing countries, it may be advisable to move directly to a 10–15 ppm sulfur standard, as such fuels are broadly available in global markets and do not require domestic refinery upgrades. Countries with no refining capacity often find that adopting the final ultra-low-sulfur standard from the start reduces transition complexity. 

• Include Essential Institutions:

  Customs and Port Authorities: These agencies are the primary point of entry, responsible for controlling imports and preventing the dumping of high-sulfur fuel.

  Petroleum Importers and Distributors: Essential for aligning import logistics and ensuring the new standard can be met by the global supply chain.

  Regional Economic Commissions: Direct engagement with regional economic commissions like ECOWAS, EAC, or harmonized international frameworks like CEDARE (2016) is critical to align national standards with regional transboundary agreements, which strengthens the country's negotiating power with international suppliers.

Key Coordination Focus: The Task Force's primary role is to establish and fund the independent testing and enforcement regime at all points of entry, ensuring that the regulatory transition is immediately effective and that penalties for non-compliant imports are robust enough to deter illicit trade. 

This differentiated structure allows the country to speak with one voice on cleaner-fuel reform and to coordinate domestic actions with regional frameworks, ensuring accountability and maximizing the speed of the transition. 

AQMx Guidance on Legal Framework and Policy Design

Core Planning Actions

These actions are foundational and must be executed regardless of the country’s refining status:

• Set a Clear National Goal: Use the established baseline data to define a time-bound technical objective—for example, achieving a maximum sulfur content of 10 ppm for both diesel and gasoline by 2030 (with intermediary steps as needed), consistent with international best practice (e.g., Euro VI equivalent). This goal must be transparently communicated.  
• Define Technical Standards: Update national fuel-specification regulations to set mandatory limits on key parameters such as sulfur, aromatics, oxygenates, and metals. These standards must explicitly reference internationally accepted test methods and specifications such as ASTM D975 (diesel) and ASTM D4814 (gasoline), EN 590 (diesel) and EN 228 (gasoline), and the EU Fuel Quality Directive 98/70/EC. National standards should also align with relevant regional harmonization efforts such as the EAC standards and ECOWAS directives. For consistency and transparency, countries should refer to the UNEP/PCFV Global Sulphur Progress Tracker as a global reference for current fuel-quality and sulfur-limit benchmarks. 

Note on biofuels: In recent years, alternative fuels such as biofuels have been promoted as components of low-carbon energy strategies, yet authoritative assessments caution that their large-scale deployment can create significant trade-offs. FAO's Bioenergy and Food Security (BEFS) Approach brings that expanding biofuel feedstock production can drive land-use change, increase pressure on croplands, and heighten risks to food security in regions with constrained agricultural resources. Moreover, evidence from the IEA (2018) and ICCT (2021) indicates that several biofuel pathways still emit notable quantities of air pollutants (such as NOₓ, HC, CO, and PM) underscoring the need for planning and regulatory frameworks that carefully evaluate sustainability, land availability, and air-quality implications. 

Differentiated Strategy: Producer vs. Importer

The implementation and financing components of the plan must be tailored to the country's unique supply chain constraints.

For a Fuel-Producing Country (Domestic Refineries)

The strategy must prioritize the complex, high-capital industrial transition of the domestic refining sector.

• Select a Pathway: Countries can adopt a staged sulfur-reduction pathway (e.g., 500 → 50 → 10 ppm) explicitly aligned with the domestic refinery-upgrade schedule. This approach allows refiners to secure financing, expand hydrotreating and hydrogen capacity, and complete necessary upgrades while maintaining fuel-supply stability. A contingency plan for temporary imports of Ultra-Low Sulfur (ULS) fuels should also be included to prevent shortages during construction or shutdown periods. Direct implementation of 10 ppm is technically feasible, as demonstrated by fuel-producing countries with already modernized, high-complexity refineries such as Japan, South Korea, Singapore, and the United Arab Emirates. Countries can follow this model if their refineries have sufficient hydrotreating capacity, hydrogen production, and supporting units in place;
• Assign Responsibilities and Financing: Specify the Ministry of Energy or National Oil Company as the lead for the technical upgrade. Identify dedicated funding sources, such as development banks, climate funds, or a ring-fenced fuel levy on current production, to finance the capital expenditure required for the refinery modernization.
• Synchronize Timelines: New vehicle-emission standards (e.g., Euro VI equivalent) can be introduced as soon as the national refinery system has demonstrably achieved the required ultra-low-sulfur fuel standard (e.g., 10 ppm). The only necessary lag is the period needed to clear remaining stocks of higher-sulfur fuels, ensuring that new vehicles are not exposed to off-spec fuel and minimizing the risk of catalyst poisoning. 

For a Fuel-Importing Country

The strategy must prioritize regulatory enforcement, border control, and market incentives to leverage the global availability of ULS fuels.

• Immediate Implementation: The transition can be significantly accelerated. The plan should define a rapid, non-reversible regulatory timeline, as the transition is a regulatory decision, not an infrastructure build-out. The focus is on immediate, strict enforcement at all points of entry
• Assign Responsibilities and Financing: Specify the Customs Authority and the National Standards Bureau as the lead enforcement agencies. Identify funding sources for compliance, such as penalties from non-compliant imports and refer to the guidance from international partners and seek technical assistance when available (e.g., UNEP, US EPA) to establish robust, independent testing laboratories.
• Synchronize Timelines: The introduction of new vehicle-emission standards (e.g., Euro VI equivalent) should be scheduled to take effect concurrently with or immediately following the national ULS fuel standard. The focus is on aligning the import of vehicles with the readily available cleaner fuel, complemented by mandatory Inspection & Maintenance (I/M) programs to ensure in-use compliance.

This differentiated approach provides a transparent, time-bound pathway that links technical regulation, economic feasibility, and institutional accountability, ensuring a successful transition regardless of the country's position in the global fuel supply chain.

Core Integration Actions (Universal)

Institutionalize Inter-Ministerial Coordination: Establish a permanent coordination mechanism — such as a Clean Fuels Task Force or an inter-ministerial committee — as detailed in Step 2: Institutional arrangements.

Integrate into National Strategies: Clean-fuel and air-quality objectives should be fully integrated into national climate and development frameworks. The clean-fuel roadmap must feed into Nationally Determined Contributions (NDCs), Air Quality Management Plans (AQMPs), and Long-Term Low-Emission Development Strategies (LT-LEDS) to ensure lasting political and financial commitment. Incorporating short-lived climate pollutants (SLCPs) such as black carbon within NDCs strengthens both climate mitigation and health co-benefits. The CCAC Guidance on Including Black Carbon and Other Air Pollutants in NDCs (CCAC, 2024) and the UNEP Technical Guidance on Governance mechanisms and institutional arrangements (UNEP, 2025) provide practical approaches for aligning clean-fuel measures with national climate goals.

Evidence shows that embedding clean-air and transport measures in national frameworks—through updated NDCs, LT-LEDS, and investment plans—enhances financing access and policy coherence (World Bank, 2024). Sulfur-reduction and clean-fuel milestones should also be integrated into transport, industrial, and public investment strategies to link fuel quality improvements with vehicle standards, logistics, and refinery upgrades.

Mainstream Fuel-Quality Objectives in Sectoral Budgets and Planning : Require key ministries (Energy, Environment, Transport) to include clean-fuel milestones and monitoring activities in their annual budgets and performance frameworks. Assign measurable Key Performance Indicators (KPIs) to ensure accountability and transparent progress tracking. Regional examples such as the ASEAN Fuel Economy Roadmap demonstrate how institutional alignment across ministries accelerates implementation and unlocks international finance (ITF, 2022).

Strengthen Policy Coherence Through Integrated Planning Tools: Adopt joint monitoring, evaluation, and reporting systems that bridge the energy and environment sectors. Use integrated air-quality and climate MRV frameworks to capture the co-benefits of cleaner fuels for emissions, public health, and competitiveness. 

Differentiated Policy-Integration Strategies

For Fuel-Producing Countries 

Policy integration should focus on industrial and energy-sector alignment. The Ministry of Energy leads refinery modernization planning in coordination with the Ministries of Environment and Industry to ensure upgraded facilities meet national sulfur targets. The Environment Ministry integrates refinery data into national emission inventories and reporting systems, while Finance and Planning Ministries incorporate refinery investment programs into national development plans and green industrial strategies. Partnerships with regional metrology institutes and ISO-accredited laboratories support long-term institutional capacity building. 

For Fuel-Importing Countries

Integration focuses on supply-chain governance and trade policy alignment. The Ministries of Trade, Energy, and Environment must coordinate to ensure imported fuels meet the national specifications. Customs and Standards Agencies collaborate with Environment Ministries on information-sharing systems, while Finance Ministries integrate environmental levies or import surcharges into fiscal policy to support monitoring and quality assurance infrastructure. Aligning trade policy with clean-fuel objectives strengthens national consistency and compliance with regional harmonization goals (e.g., ECOWAS, EAC). 

Core Regulatory Actions (Universal)

These actions are essential for establishing the legal and technical foundation of the cleaner fuels policy:

• Follow Internationally Recognized Fuel Specifications:

  Legislation must reference established fuel-quality standards to ensure compatibility with modern engines, emission-control technologies, and international trade. The most widely used are EN 590 for diesel and EN 228 for gasoline in the European Union, and ASTM D975 (diesel) and ASTM D4814 (gasoline) in the United States. These standards define critical parameters such as sulfur content, aromatic compounds, density, cetane or octane rating, and volatility, which directly affect air-pollutant emissions and engine performance.

  Under EN 590 and EN 228, both diesel and gasoline must contain no more than 10 parts per million (ppm) sulfur, with diesel requiring a minimum cetane number of 51 and gasoline a Research Octane Number (RON) of at least 95 for regular and 98 for premium grades. The U.S. standards, ASTM D975 and ASTM D4814, are slightly less prescriptive, allowing 15 ppm sulfur for diesel and 10 ppm for gasoline, with a minimum cetane number of 40 and a pump octane index (AKI) of 87, 89, or 93 depending on fuel grade.

  While both systems aim to enable clean combustion and protect emission-control systems, European standards place stronger emphasis on harmonization and tighter aromatic and density controls, whereas U.S. standards prioritize refinery flexibility and regional climate adaptability. Adopting one of these internationally recognized frameworks—or aligning national standards closely with them—ensures regulatory credibility and compatibility with cleaner vehicle technologies. 

   

• Ensure alignment of the regulation with objectives set in clean fuel roadmap:

  Legislation should define national sulfur and aromatic content limits aligned with the country’s clean-fuel roadmap.

   

• Establish Robust Testing and Certification Procedures:

  Fuel-quality compliance testing must be conducted by accredited laboratories using internationally recognized analytical methods to ensure accuracy, comparability, and legal defensibility of results. Recommended procedures include ASTM D2622 or ISO 20846 for measuring sulfur content through X-ray fluorescence or ultraviolet fluorescence, ASTM D1319 or ISO 3837 for determining aromatic hydrocarbon content, and the ISO 4259 series for statistical interpretation of test results and reproducibility. These standardized methods ensure that laboratory results meet traceability and quality-assurance requirements across jurisdictions, enabling transparent reporting and cross-border recognition of compliance data. Using such harmonized test protocols is essential for credible monitoring and consistent enforcement of fuel-quality legislation. 

   

• Ensure Fuel–Vehicle Compatibility:

  Introduce a compatibility rule requiring that all new or imported vehicles meet emission standards consistent with the prevailing fuel quality (e.g., Euro VI vehicles require 10 ppm sulfur fuels). This alignment prevents equipment damage and secures the emission-reduction potential of cleaner fuels. 

   

• Establish Robust Data-Sharing and Public Fuel-Quality Reporting:

  Enhance transparency in fuel-quality management by establishing strong data-sharing and public-reporting mechanisms. Refiners and fuel-importing agencies should routinely communicate key fuel-quality parameters—such as sulfur content, cetane number, and aromatics—across all relevant ministries to support coordinated enforcement and effective policy oversight. Wherever feasible, governments should also publish aggregated monthly average values in a publicly accessible database, enabling stakeholders to verify compliance and strengthening confidence that fuels supplied to the market consistently meet national standards. 

Differentiated Strategy: Producer vs. Importer

The application and enforcement of these standards must be strategically adapted to the country's position in the global market.

For a Fuel-Producing Country

The regulatory focus is on internal production control, quality assurance, and managing the transition period. Fuel-producing countries may choose to follow a phased sequence. Where domestic refineries require time to upgrade desulfurization units, an interim 50 ppm limit can serve as a transitional step. This approach is typically most effective when coupled with an upgrade timeline that supports achieving the 10–15 ppm target within approximately 12–18 months. 

• Standard Adoption:

  The chosen international standard must be embedded into the National Technical Regulations or Fuel-Quality Decrees to give it legal force. The regulation must include a phased compliance schedule that aligns with the refinery's upgrade timeline, allowing for temporary deviations under strict governmental oversight until the final standard is met.

   

• Certification Focus:

  Certification protocols must specify mandatory sampling frequency and documentation requirements for refinery output and the internal distribution network. The regulatory body must have the authority to conduct unannounced audits of the refinery’s internal quality-control systems.

For a Fuel-Importing Country

The regulatory focus is on border control, supply chain integrity, and leveraging international standards for trade. Fuel-importing countries may find it practical to align directly with the 10–15 ppm sulfur standard used in major export hubs, enabling immediate benefits and compatibility with modern vehicle technologies. 

• Standard Adoption: 

  The chosen international standard must be applied immediately and uniformly to all imported fuel. The legislation must explicitly state that the import standard is the national standard, preventing any loophole for high-sulfur dumping. This strengthens the country's position in international trade negotiations.

   

• Certification Focus: 

  Certification protocols must specify mandatory pre-shipment or at-port-of-entry testing for all imported batches. The legislation must grant Customs and Standards Authorities the power to reject and mandate the re-export of non-compliant shipments, making the importer solely responsible for quality assurance. 

Core Communications Actions (Universal)

These actions establish the public narrative and ensure sustained engagement:

Design a National Communications Campaign: Develop a clear and relatable message—such as “Clean Fuel = Clean Air”—to make the reform visible and easy to understand. The campaign must link fuel-quality improvements directly to public-health protection, economic savings, and climate co-benefits.

Tailor Messages to Target Audiences:

• Policy-makers and Legislators: Emphasize economic competitiveness, international alignment, and the strong public health and climate benefits demonstrated through cost–benefit analyses. Highlight that cleaner fuels and vehicles reduce healthcare expenditures, increase workforce productivity, and avoid economic losses associated with pollution-related illness and premature death.
• Engage Trusted Messengers: Partner with medical associations, universities, and community organizations to deliver evidence-based messages, including economic findings that show the societal gains from transitioning to cleaner fuels and vehicles.
• Citizens and Consumers: Emphasize the immediate health and air-quality benefits of adopting cleaner fuel standards, noting that although a temporary fuel price increase may occur—as seen in real-world cases such as California’s Low Carbon Fuel Standard and Australia’s 2024 fuel-quality upgrade —these costs are typically short-lived and outweighed by rapid gains in public health and reduced vehicle maintenance costs. Highlight cleaner air, child health, and environmental justice, underscoring that investments in cleaner fuels generate measurable economic benefits for families and communities through reduced medical costs and improved quality of life. 

Communicate Transparency and Progress: Regularly publish fuel-quality testing results, compliance data, and policy milestones in accessible formats. Open data builds trust, discourages backsliding, and allows civil-society groups to amplify progress—while also making it easier to quantify and communicate the economic benefits that result from improved fuel quality and cleaner air.

Differentiated Strategy: Producer vs. Importer

The communications strategy must be adapted to address the specific economic and political sensitivities inherent in each supply model.

For a Fuel-Producing Country

The communications strategy must focus on justifying the cost of the refinery upgrade and managing expectations regarding supply stability.

• Targeted Messaging Focus:

  Transport Operators and Fuel Distributors: Focus on the long-term reliability of domestic supply and the savings in vehicle maintenance due to cleaner fuel. The message must counter any fear of fuel shortages during the refinery upgrade period.

  Policymakers and Financiers: Frame refinery upgrades as a strategic national investment and a core industrial-modernization project that strengthens domestic energy security, ensures compliance with global environmental standards, and reduces the hidden social costs associated with treating pollution-related health issues. Emphasizing long-term economic returns and avoided health expenditures can help mobilize public and private financing.

  Communication with Implementation Milestones: The campaign must have a dedicated phase to explain the refinery upgrade process, publicly celebrating key milestones (e.g., groundbreaking of the HDS unit) and managing expectations about the temporary need for imported fuel during the transition.

• Transparency Focus: Publicly report on the refinery's compliance rate and the use of any dedicated fuel levies to fund the upgrade, ensuring the public understands where their money is being invested. 

For a Fuel-Importing Country

The communications strategy must focus on justifying the rapid regulatory change and emphasizing the immediate enforcement of the new standard.

• Communication with Implementation Milestones: The campaign must have a dedicated phase to publicize the new border enforcement regime, showcasing images of rejected non-compliant shipments and highlighting the role of Customs and Standards Agencies as public health protectors.

   

• Transparency Focus: Publicly report the compliance rate of imported fuel and the number of non-compliant shipments rejected at the border, which reinforces the credibility of the enforcement agencies and deters illicit trade.

Effective communication transforms cleaner-fuel reform from a technical exercise into a national public-health and development achievement, securing lasting support for future clean-transport policies. 

AQMx Public Engagement and Communications Guidance

Core Implementation Actions (Universal)

These actions establish the legal and operational framework for the transition:

• Officially Publish and Operationalize New Regulations: 
  The implementation phase begins with the formal publication of updated fuel-quality standards and supporting regulations through the government gazette or relevant ministerial decree. This step gives legal force to the new requirements and defines the compliance obligations of all stakeholders. Operationalization must include clear guidance on the date of enforcement, grace periods for adaptation, and the roles of different agencies in inspection and certification.
• Launch Digital Compliance Registries and Online Reporting Systems: 
  Digital tools are essential to track compliance efficiently and transparently. A centralized compliance registry allows regulators to record and monitor certified fuel batches, laboratory results, import documentation, and inspection findings in real time. Public dashboards should be used to summarize compliance performance and support accountability.
• Create an Open Fuel-Quality Transparency Portal: 
  To reinforce trust and discourage tampering or backsliding, governments can establish an open-access online platform where national or regional fuel-quality parameters—such as sulfur content, cetane number, aromatics, and density—are regularly published. The portal should present aggregated monthly results from certified laboratories and inspection agencies, enabling researchers, civil society, and the public to independently track progress and verify compliance. This transparency mechanism strengthens credibility and motivates consistent performance across the supply chain.
• Maintain a Technical Helpdesk and Issue Regular Guidance Notes: 
  A dedicated helpdesk serves as a continuous support mechanism for regulated entities and inspectors, providing authoritative clarification on technical questions and communicating updates on testing procedures and reporting formats. This fosters compliance through understanding rather than penalties alone.
• Document Lessons Learned and Update Operational Procedures: 
  Implementation is a continuous learning process. Regulators should systematically document challenges, corrective actions, and institutional responses to ensure that lessons are institutionalized and used to update operational manuals and training materials.
• Coordinate Enforcement Activities across Ministries and Regional Authorities: 
  Cleaner-fuel implementation requires alignment across multiple institutions: Energy for production/import licensing; Environment for pollution control; Transport for vehicle standards; Customs for border compliance; and Metrology for laboratory accuracy. Establishing an inter-agency coordination platform ensures consistent interpretation of rules and enables joint inspections or shared data systems.
• Establish Transparent Public Reporting Mechanisms: 
  Public communication of compliance results reinforces accountability and strengthens consumer confidence. Regularly published summaries of sulfur levels, sampling outcomes, and enforcement actions should be accessible to stakeholders, encouraging voluntary compliance and supporting regional coordination by providing comparable data across borders. 

Differentiated Strategy: Producer vs. Importer

The strategy for surveillance, enforcement, and market monitoring must be adapted to the primary source of the fuel supply.

For a Fuel-Producing Country

The implementation focus is on monitoring the industrial process, verifying refinery output, and managing domestic supply stability.

• Conduct Systematic Sampling and Market Surveillance: 
  The monitoring program must prioritize systematic sampling at the refinery gate and primary distribution terminals. Sampling frequency (preferably by surprise inspections) should be based on the refinery’s production volume and historical compliance risk. Samples must be analyzed by accredited laboratories, with results feeding directly into the compliance registry, and counter-samples must be retained to allow verification in case any disclaimer or dispute arises.
• Monitor Supply Stability, Fuel Pricing, and Market Availability: 
  Authorities must closely track refinery production volumes and domestic inventory levels to detect any potential supply shortages arising from the upgrade process or unexpected shutdowns. Early identification allows for timely intervention, such as the temporary release of strategic reserves or the adjustment of import quotas. 

For a Fuel-Importing Country

The implementation focus is on border enforcement, preventing illicit trade, and monitoring global market dynamics.

• Conduct Systematic Sampling and Market Surveillance: 
  The monitoring program must prioritize mandatory sampling of all imported batches at the port of entry or border crossing. This initial inspection is the single most effective point of control. Secondary surveillance should involve randomized testing at retail outlets and along major transport corridors to detect adulteration in the distribution network.
• Enforce Compliance through Clear Penalties and Corrective Measures: 
  Enforcement must be focused on the importer’s license and the rejection of non-compliant cargo. Penalties must be severe—including the mandatory re-export or destruction of non-compliant fuel and the suspension of the importer’s license—to deter illicit trade and prevent market distortion.
• Monitor Supply Stability, Fuel Pricing, and Market Availability: 
  Authorities must closely track global market prices and import flows to ensure the transition to cleaner fuel does not lead to speculative pricing or supply bottlenecks. Monitoring the compliance rate of importers is crucial for identifying systemic issues and ensuring that the global supply chain is meeting national regulatory demand.

Establish a Comprehensive Fuel-Compliance Framework

A robust enforcement framework integrates preventive, detective, and corrective mechanisms that reinforce one another throughout the compliance cycle.

• Preventive Measures. Establish clear legal mandates that define the roles of enforcement authorities and stipulate penalties for non-compliance. Require all fuel suppliers to maintain certified documentation demonstrating that imported or domestically produced fuels meet the national sulfur and quality standards, following recognized test methods such as ASTM D2622-21, ISO 20846:2024, and ISO 4259-2:2022.
• Detective Measures. Implement random sampling and laboratory verification at refineries, import terminals, and retail stations. Establish statistically sound sampling plans, accredited laboratories under ISO/IEC 17025:2017, and documented chain-of-custody procedures. Adopt legal metrology frameworks for fuel measurement and verification. Maintain a digital compliance registry integrating laboratory results, sampling locations, and inspection reports.
• Address Adulteration and Diversion Risks. Even when fuels enter the market in compliance with national specifications, quality can deteriorate or be deliberately altered as products move through the distribution system. Adulteration may occur through the blending of compliant fuel with higher-sulfur or untaxed products, substitution during transport, or diversion between depots and retail stations. To safeguard supply-chain integrity, enforcement agencies should integrate systematic checks at storage depots, transport corridors, and retail outlets, supported by documented chain-of-custody procedures, sealed-tanker protocols, and digital fuel-tracking systems. Fuel-marking (i.e., coloring dyes) programmes may also be considered where risks of tampering or diversion are high. Together, these measures help ensure that compliant fuel delivered at the point of import or production reaches consumers without degradation.
• Corrective Measures. Apply graduated penalties ranging from administrative fines and corrective-action plans to license suspension or criminal prosecution for repeated offenses. Ensure consistency and proportionality in enforcement through a transparent appeal process, and publish enforcement results and lists of non-compliant operators to deter misconduct.

Differentiated Enforcement Strategy: Producer vs. Importer

The focus of enforcement must align with a country’s fuel supply structure.

For Fuel-Producing Countries

Enforcement centers on refinery output control and auditing of internal quality processes to ensure production meets national sulfur and aromatic content limits. Continuous gate monitoring and periodic process audits are essential. Penalties should directly affect refinery operations and investment plans, including fines linked to the volume of non-compliant fuel and time-bound corrective action plans for facility upgrades. Inter-agency coordination between the Ministry of Energy/Petroleum, the National Standards Bureau, and the Ministry of Environment ensures compliance and oversight. 

For Fuel-Importing Countries

Enforcement focuses on border control and prevention of high-sulfur dumping. Mandatory sampling of all imported fuel batches at ports of entry or border crossings provides the strongest deterrence. Fuel marking and tracking systems help trace supply chains and detect smuggling or tax evasion. Immediate penalties—such as rejection or destruction of non-compliant cargo and suspension of import licenses—prevent substandard fuel from entering the market. Coordination among the Customs Authority, National Standards Bureau, and Ministry of Trade is essential for effective oversight. 

Cross-Cutting Enforcement Actions

• Coordinate Inter-Agency Enforcement. Effective compliance requires collaboration among ministries of Energy, Environment, Transport, Customs, Trade, and National Standards Bureaus. Conduct joint inspections combining technical testing (standards bureau), fiscal control (customs), and environmental oversight (environment ministry). Establish inter-agency data-sharing protocols to flag anomalies and designate a national Clean Fuels Enforcement Task Force with formal authority to coordinate inspections and compile enforcement reports.
• Institutionalize Data Transparency. Transparency enhances credibility, promotes voluntary compliance, and builds public trust. Publish quarterly compliance bulletins summarizing sampling results and enforcement actions. Develop public dashboards visualizing average sulfur content, geographic patterns, and trends to communicate progress. Independent verification or civil-society monitoring adds credibility and strengthens accountability.
• Link Fuel-Quality Data with Vehicle Oversight Systems. Integrating fuel-quality monitoring with vehicle inspection and maintenance (I/M) systems ensures policy coherence across the transport sector. Emission anomalies in I/M tests (e.g., excessive PM or SO₂) can signal potential off-spec fuels. Cross-referencing such data helps authorities identify retail stations or distributors associated with repeated non-compliance and prioritize them for inspection.
• Build Long-Term Institutional Capacity. Sustained enforcement depends on trained personnel, accredited laboratories, and institutional stability. Develop continuous training programs for inspectors, customs officers, and laboratory technicians based on UNEP/PCFV and ISO methodologies. Maintain ISO/IEC 17025 accreditation to ensure legally defensible test results. Establish cooperation agreements and resource-sharing mechanisms among agencies to guarantee continuity and technical credibility.

Core Capacity-Building Actions (Universal)

• Strengthen Public-Sector Capability and Institutional Leadership. Ensure that key ministries—Energy, Environment, Transport, Trade, Health, and Finance—have clear legal mandates, qualified staff, and decision-making authority. Introduce career development pathways for civil servants working in fuel quality, metrology, and environmental compliance.
• Institutionalize Monitoring and Data Management. Public agencies must be capable of compiling and interpreting compliance data. Develop digital platforms and dashboards for inter-agency data exchange (e.g., customs–standards–environment ministries), supported by training in data analytics, reporting, and open-data publication.
• Institutionalize Technical Training and Laboratory Accreditation. Clean-fuel governance rests on a technically competent backbone. This requires developing sustainable training programs for inspectors and laboratory personnel, and maintaining laboratory accreditation under ISO/IEC 17025 to ensure test results are reliable and legally admissible.
• Promote Regional Cooperation and Public–Public Partnerships. Create regional laboratory and regulatory networks under frameworks such as ECOWAS, EAC, ASEAN, or MERCOSUR for shared training, data harmonization, and joint inspections. Designate regional public-sector centers of excellence to provide training for government officials and regulators. 

Differentiated Strategy: Producer vs. Importer

The strategy for securing sustainable financing and building technical capacity must be adapted to the primary source of the country’s clean-fuel challenge.

For a Fuel-Producing Country  

The capacity-building focus is on industrial regulatory oversight, technical auditing, and financing large-scale infrastructure.

• Sustainable Financing Focus. The strategy must prioritize securing sustainable funding for refinery upgrade capital expenditures (CAPEX) and the effective oversight of industrial processes. This includes leveraging blended finance to support critical infrastructure such as refinery testing units, laboratories, and metrology equipment, with co-financing from development banks or climate funds, and a gradual transition toward domestic revenue sources for long-term sustainability. In parallel, a Refinery Investment Fund should be established—embedded in law and financed through a modest levy on domestic fuel production—to ensure continued financing for laboratory operations, accreditation, and enforcement logistics related to refinery output.
• Technical Capacity Focus. Prioritize training for staff in the Ministry of Energy and National Standards Bureau on industrial process auditing, refinery technology assessment, and the legal transposition of international standards into domestic production mandates. 

For a Fuel-Importing Country

The capacity-building focus is on border enforcement, supply-chain integrity, and financing robust regulatory control.

• Sustainable Financing Focus. The strategy must prioritize securing sustainable funding for enforcement infrastructure and operational costs at border entry points. A Fuel-Quality Enforcement Fund should be established—embedded in law and financed through import-inspection fees and penalties from non-compliant shipments—to provide a stable revenue stream for laboratory operations, accreditation, and enforcement logistics, managed by the Customs Authority or Standards Bureau under multi-stakeholder oversight. In addition, securing line-item budget allocations within Customs and the National Standards Bureau is essential to sustain staff retention, capacity-building programs, and active participation in international coordination platforms such as UNEP/PCFV
• Technical Capacity Focus. Prioritize training for Customs officers and Standards Bureau inspectors on sampling procedures, evidence management, and the use of digital tracking systems to ensure consistent and legally sound enforcement at all points of entry.

This differentiated approach ensures that capacity-building investments are targeted, sustainable, and directly support the unique regulatory challenges faced by each country type, securing the long-term success of cleaner-fuel reform. 

Integrating QA/QC into Monitoring and Evaluation

Quality assurance and quality control (QA/QC) are central to credible monitoring and evaluation systems. They ensure that national reporting on fuel quality, emissions, and health outcomes is scientifically defensible, internationally comparable, and legally admissible. A well-structured QA/QC framework transforms compliance testing into a continuous performance-monitoring tool.

• Accredited Laboratories: Require that all compliance testing be conducted in laboratories accredited under ISO/IEC 17025:2017 to ensure technical competence and traceable measurement systems.
• Standardized Analytical Methods: Adopt recognized methods for sulfur and aromatic content testing—ASTM D2622 (X-ray fluorescence) and ISO 20846 (UV fluorescence)—and use ISO 4259-2 decision rules for statistical interpretation and conformity assessment.
• Metrology and Calibration: Apply OIML guidance for legal metrology, fuel metering, and calibration to ensure reliability of quantitative measurements.
• Institutional Data Systems: Integrate QA/QC results into digital databases shared among the Ministry of Energy, Customs, National Standards Bureau, and Environment agencies. This promotes transparency and allows cross-referencing with enforcement and inspection data.
• Competence and Capacity Building: Partner with UNEP/PCFV, ISO, and regional metrology networks (e.g., ARDA and ECOWAS) to build QA/QC capacity, develop proficiency testing, and maintain ISO accreditation.
• Independent Oversight: Establish regular inter-laboratory comparisons and third-party verification audits to strengthen public trust and international credibility.

These QA/QC procedures guarantee that national datasets—used to measure sulfur levels, compliance rates, and health outcomes—are reliable and defendable under scrutiny. 

Tracking Progress through Indicators

Tracking progress through a clear, well-structured indicator framework ensures that cleaner-fuel reforms remain measurable, transparent, and continuously improved. Indicators translate complex policy goals into actionable evidence that decision-makers can use to assess performance, adjust enforcement, and communicate results to stakeholders and the public. A good framework is concise—focusing on a limited set of high-value metrics that capture compliance, enforcement, health, environmental, and economic outcomes.

Key Principles:

• Indicators must be specific, measurable, achievable, relevant, and time-bound (SMART).
• Data collection should be institutionalized, not project-based, ensuring sustainability across budget cycles.
• Indicators should be linked to existing national systems (air-quality monitoring, customs databases, health surveillance, and budget reports).
• Public dissemination of results through regular bulletins or dashboards promotes transparency and builds trust.

Fuel Compliance Indicators

Objective: Assess the availability and consistency of cleaner fuels throughout the national supply chain.

Example Indicators:

• Average sulfur concentration (ppm) in diesel and gasoline by region and quarter.
• Percentage of samples meeting national standards.
• Number of laboratories accredited under ISO/IEC 17025.

Responsible Institutions: Ministry of Energy; National Standards Bureau / Metrology Institutes / Superintendencies.

Implementation Notes: Routine fuel-sampling data from accredited laboratories should feed directly into a centralized QA/QC database. Use ISO 4259-2 methodologies to identify statistically significant deviations. Results should be shared quarterly among relevant ministries and published through dashboards or bulletins.

Enforcement Indicators

Objective: Evaluate the effectiveness and reach of enforcement mechanisms.

Example Indicators:

• Number of inspections conducted by agency and region.
• Percentage of violations resolved or sanctioned.
• Corrective-action plans completed within deadlines.
• Frequency of inter-agency coordination meetings or joint inspections.

Responsible Institutions:  Clean Fuels Task Force; Ministries of Environment, Energy, and Transport; Customs and Standards Authorities.

Implementation Notes: Integrate QA/QC findings into enforcement data to cross-check fuel-quality results with inspection performance. Dashboards summarizing inspection coverage, non-compliance rates, and QA/QC outcomes build credibility and enable targeted enforcement responses.

Health and Environmental Indicators

Objective: Demonstrate the co-benefits of cleaner fuels for public health and environmental quality.

Example Indicators:

• Average roadside concentrations of PM₂․₅ NOx and SO₂ in major cities.
• Hospital admissions or outpatient visits for respiratory and cardiovascular diseases.
• Estimated premature deaths avoided or DALYs saved. 

Responsible Institutions: Ministry of Health; Ministry of Environment; National Public Health Institute.

Implementation Notes: Link air-quality and health databases to fuel QA/QC data to analyze correlations between reduced sulfur content and improved air quality. Recognize that cleaner fuels do not automatically lead to lower pollution levels, as outcomes also depend on transboundary pollution, other emission sources, vehicle fleet composition, enforcement effectiveness, and background emission levels. Use WHO AirQ+ to quantify potential avoided mortality and health and economic gains. 

When interpreting these indicators, it is important to recognize that measured health improvements may not solely reflect progress in the transport sector. Pollution levels and health outcomes can also be influenced by emissions from other sectors—such as energy, industry, and agriculture—as well as by weather conditions, topography, and transboundary air pollution originating from neighboring countries. These overlapping sources may mask or offset the observable health benefits of cleaner fuels. Therefore, results should always be contextualized within a broader multi-sectoral and regional air-quality framework to ensure accurate attribution and policy coherence. 

Economic Impact Indicators

Objective: Capture the economic efficiency and fiscal benefits of cleaner fuels.

Example Indicators:

• Reduction in vehicle maintenance costs associated with cleaner fuel use.
• Revenue generated from environmental levies funding QA/QC programs.
• Investments leveraged from climate funds or private-sector co-financing.

Responsible Institutions: Ministries of Finance and Transport; National Planning and Economic Development Agencies.

Implementation Notes: Integrate QA/QC program costs and revenues into annual budgeting cycles. Track cost–benefit ratios to demonstrate fiscal sustainability and attract donor or private-sector co-financing.

No-Cost / Institutional Measures 

Many critical steps toward cleaner fuels do not require substantial financial outlays but depend instead on political will, coordination, and institutional clarity. Governments can update or draft fuel-quality regulations, often by adapting regional or international models. Embedding clean-fuel standards into national air-quality management plans (AQMPs), Nationally Determined Contributions (NDCs), or Long-Term Low-Emission Development Strategies (LT-LEDS) ensures policy coherence and long-term commitment. 

Additional no-cost actions include setting up inter-ministerial coordination mechanisms—typically between energy, environment, and transport ministries—to align enforcement and communication. Public disclosure of fuel quality data, inspection results, and refinery compliance builds transparency and accountability. Communication campaigns leveraging existing institutional channels (websites, social media, public briefings) help educate consumers and fuel distributors about new standards without requiring new infrastructure. 

Low-Cost / Operational Measures 

Operational steps usually involve modest investments in human capacity, equipment, and oversight systems. Establishing a Quality Assurance / Quality Control (QA/QC) program is essential to ensure fuels meet regulatory standards once introduced. This can include routine sampling at refineries, import terminals, and retail stations; creation of compliance reporting templates; and digital systems for traceability. 

At this level, financing can often come from national budget allocations, small surcharges on fuel imports, or reallocation of existing environmental funds. Partnerships with international organizations (e.g., UNEP PCFV, CCAC, or regional development banks) frequently provide targeted technical assistance and limited grants for these operational activities. 

High-Cost / Capital Investments 

The most financially demanding interventions involve upgrading physical infrastructure and long-term monitoring systems. Refinery modernization—especially the installation of hydrotreaters or desulfurization units—requires large capital expenditures that can exceed hundreds of millions of dollars depending on refinery size and configuration. In countries without domestic refining capacity, similar costs may arise from reconfiguring import and blending terminals or adjusting regional supply contracts to secure ultra-low-sulfur fuels. 

Complementary investments include the modernization of fuel-testing laboratories, equipment accreditation, and participation in regional inter-laboratory comparison networks to maintain analytical reliability. Establishing continuous monitoring infrastructure (e.g., for sulfur content, vapor pressure, or adulteration) and data-management systems integrated with customs and tax authorities also falls within this category.

Financing for high-cost investments typically draws on a combination of public–private partnerships (PPPs), multilateral development bank (MDB) loans, blended finance instruments, and climate funds. In some cases, governments have embedded small fuel levies within national petroleum legislation to create dedicated Clean Fuels Funds that sustain laboratory operations, QA/QC, and public-awareness programs over time. 

Fuel-Levy Funds

A small surcharge on diesel and gasoline can generate a predictable domestic revenue stream to fund:

• quality-assurance (QA/QC) programmes,
• laboratory operations and equipment maintenance,
• random sampling and field inspections, and
• public-awareness campaigns.

Example: In Germany, in April 1999 the government considered a tax increase on high-sulfur gasoline and diesel, while offering reduced tax rates for low-sulfur fuels. This created a market-based incentive for cleaner fuels and was part of a broader ecological tax reform. 

Implementation considerations: Design of fuel levies must account for social equity and political acceptability. Without clear communication and measures to mitigate burden on vulnerable groups, these instruments can provoke public resistance. Transparent earmarking of proceeds and visible reinvestment in cleaner transport or social programmes strengthens public trust. 

Import-Inspection Fees

Customs and standards agencies can adopt modest fees to finance:

• border sampling and testing of imported fuels,
• laboratory analysis for sulfur and other contaminants, and
• legal enforcement and penalties for fuel-quality non-compliance.

Example: The EU’s system of customs laboratories, supported by excise duties and energy product taxes, includes fuel-quality testing components. The European Commission’s Customs Laboratories European Network (CLEN) describes how customs labs exercise scientific expertise for tax classification and fuel-quality control. 

Implementation considerations: Import-inspection fees must be clearly defined in law, proportional to cost, and dedicated to verification/enforcement functions. Transparency in fee structure and use of revenue ensures legitimacy and avoids perceptions of hidden charges. 

Public–Private Partnerships (PPPs)

PPP models can finance and operate:

• construction or modernisation of laboratories,
• equipment procurement and maintenance,
• testing and analytical services under performance-based contracts, and
• infrastructure enabling low-sulfur fuel logistics (e.g., terminals, storage and pipelines).

Example: In Mozambique, the Law on PPP, Large-Scale Projects and Concessions (Law 15/2011) provided a legal basis for long-term concessions of port and liquid-bulk fuel terminals. Private operators invest, construct and manage petroleum-product terminals at Maputo–Matola, Nacala and Pemba under state oversight.

Implementation note: PPPs require robust legal frameworks, precise performance indicators, transparent procurement and accountability. For placement-type models (equipment leasing in public labs), the distribution of ownership, maintenance and service continuity must be contractually clear. 

Development-Partner Support

Development institutions provide grants, concessional loans and technical assistance that are essential for:

• baseline fuel-quality assessments and audits,
• upgrading public laboratories and mobile testing kits,
• training customs and regulatory personnel, and
• supporting early enforcement of new sulfur standards.

The Partnership for Clean Fuels and Vehicles (PCFV), convened by United Nations Environment Programme (UNEP) and supported by the Global Environment Facility (GEF), the World Bank and the European Union, has assisted more than 120 countries in phasing-out leaded gasoline and reducing sulfur levels in fuels. 

Examples and actions:

• Assessments & planning: PCFV grants and TA funded studies in West Africa; Ghana’s switch to 50-ppm diesel in 2017 was informed by these data.
• Lab upgrades: PCFV’s regulatory toolkit and pilot programmes in East Africa supported test-method design, mobile-kit procurement and field sampling protocols aligned with 50-ppm standards.
• Training: Regional PCFV training for customs, energy and environment officials improved field sampling and enforcement capacity.
• Early enforcement: In 2020 ECOWAS ministers adopted regional 50-ppm sulfur limits; UNEP-supported monitoring at import terminals in Nigeria and Côte d’Ivoire gave early credibility. 

Blended Finance for Infrastructure Upgrades

Refinery desulfurisation, fuel-import terminals and cleaner-fuel logistics often require large upfront investment. Blended finance—using concessional public capital to de-risk private investment—is an effective mobiliser.

Example: The European Bank for Reconstruction and Development (EBRD)-backed Nadezhda (NADS) Terminal Project in Ukraine leveraged a concessional tranche from the Eastern Europe Energy Efficiency and Environment Partnership (E5P) and commercial financing from Raiffeisen Bank Ukraine to modernise a fuel-logistics terminal for ethanol and cleaner-fuel blends.

Outcome: The structure reduced risk for private capital, improved cleaner-fuel logistical access and demonstrated how blended finance can support transitions. 

Results-Based Climate Finance (RBF)

Under RBF, payments are made only after verified emission reductions—especially black carbon (BC) and fine particulate matter (PM₂.₅). Fuel-quality and vehicle-emission programmes that meet verification criteria are eligible.

The CCAC’s Black Carbon Finance Study highlights diesel-sector transitions as priority areas for RBF instruments. The Clean Air Fund’s State of Global Air Quality Funding 2025 report shows RBF is increasingly being explored to align air-quality and climate objectives, though such mechanisms are still nascent for fuel sulfur reduction programmes. 

Institutionalising the Financing Framework

To ensure transparency, continuity and accountability, financing instruments (levies, inspection fees, PPPs, blended and results-based finance) should be:

• embedded in national law (e.g., petroleum, tax or fuel-quality legislation),
• governed through multi-stakeholder oversight bodies,
• subject to regular public audits and performance reviews, and
• aligned with national transport, air-quality and climate strategies (e.g., NDCs, LT-LEDS).

Institutionalised frameworks are critical. Evidence from the World Bank, OECD and UNEP emphasises that durable cleaner-fuel programmes depend on predictable and diversified funding, statutory earmarking, inter-agency coordination and transparent governance. 

Unequal Exposure to Transport-Related Pollution

Women’s exposure patterns differ from men’s because of social and economic roles that often place them in high-pollution microenvironments. This creates a gender-differentiated health burden that clean fuel policy must explicitly address:

• Street-Level and Informal Work: Women working as vendors, market sellers, waste pickers, and cleaners spend long hours near congested roads and transport hubs where black carbon (BC) and nitrogen dioxide NOx levels are highest. Studies in cities like Accra, Ghana (Amegah et al., 2014), and Bangkok, Thailand (Noomnual et al., 2016), confirm that women are the majority of street vendors (up to 67% in some contexts) and are highly exposed to traffic emissions, leading to increased risk of work-related illnesses.
• Commuting and Caregiving Responsibilities: Women are more reliant on public and informal transport and engage in "trip-chaining"—making frequent, shorter trips with multiple stops to combine tasks like commuting, shopping, and caregiving. This pattern often forces them to spend more time waiting at high-exposure bus terminals or walking along busy roads, leading to higher cumulative exposure to PM2.5 and ultrafine particles.
• Reproductive and Child-Health Impacts: Pregnant people exposed to high levels of black carbon and PM2.5 face elevated risks of adverse reproductive outcomes. Epidemiological studies show that an increase in black carbon exposure during pregnancy is associated with a measurable drop in infant birth weight (Dong et al., 2022).

Targeted Actions for Gender-Transformative Inclusion

Policy and Governance

• Inclusive Governance: Mandate gender balance in the inter-ministerial Clean Fuels Task Force, standards committees, and public consultations. Representation must include leadership positions and go beyond token participation to ensure that the policy design reflects the differentiated mobility and health concerns of women.
• Gender-Responsive Data Systems: Require all ministries and donor programs to collect sex-disaggregated data on participation, training outcomes, and exposure reduction. The report "Towards Gender-Transformative Action on Super Pollutants" (CCAC, 2025) recommends to use gender-differentiated statistics to improve understanding of transport decisions and evaluate progress.
• Develop a Policy Narrative: Create a clear narrative that links clean fuel reform to public health, child safety, and economic justice, ensuring the policy is framed as a national development achievement, not just a technical compliance exercise.

Exposure Reduction and Safety

• Prioritize Mitigation in High-Exposure Zones: Prioritize monitoring and mitigation around public transport terminals, markets, and schools where women and children are over-represented. Use disaggregated exposure data to guide enforcement and infrastructure planning, as recommended by the CCAC-Oxfam report.
• Enhance Public Transport Safety: Link the cleaner fuel mandate to urban transport planning that prioritizes the deployment of soot-free public transport on high-use routes. Simultaneously, invest in safety and security measures (e.g., better lighting, security personnel) at public transport hubs, which is a primary barrier to women's mobility and access to economic opportunities. 

Economic and Employment Inclusion

• Employment Inclusion: Actively recruit and train women in the technical workforce—QA/QC laboratories, inspection teams, and environmental agencies. Programs such as ARDA’s Laboratory Accreditation Initiative can be leveraged to ensure at least 30–50% female participation in training cohorts, addressing the underrepresentation in the technical sector.
• Affordability and Fairness: Establish targeted financial mechanisms—microcredit lines, cooperative funds, or grant schemes—for women-led transport microenterprises and small service operators to transition to low-sulfur fuels or cleaner vehicles. This ensures equitable access to the benefits of modernization and prevents the policy from placing an undue financial burden on the informal sector.

Disproportionate Exposure to Transport-Related Air Pollution

The spatial and occupational patterns of air pollution exposure create clear socio-economic disparities that clean fuel policy must address:

• Urban and Peri-urban Residents in High-Traffic Zones: Low-income neighborhoods are consistently and disproportionately located near highways, logistics hubs, and industrial zones where land values are lower but pollutant concentrations are higher. Global analysis shows that the world's lowest income people are the most exposed to unsafe levels of air pollution (Rentschler, 2023). In the United States, studies confirm that low-income and minority tracts are particularly exposed to vehicular PM2.5 and NOx (Clark et al., 2017). This proximity to transport corridors increases rates of asthma, cardiovascular disease, and childhood respiratory illness.
• Informal-Sector and Roadside Workers: Street vendors, waste pickers, motorbike couriers, and informal transport operators spend long hours outdoors at curb level—exactly where vehicular exhaust concentrations are greatest. Research in Sub-Saharan Africa, such as in Nairobi, Kenya, confirms that these roadside workers experience elevated occupational exposure to Black Carbon (BC) and PM2.5 (Ngo et al., 2015). This occupational exposure can be several times higher than average, making these workers a priority for health protection.
• Users and Operators of Aging Vehicles: Drivers and passengers of old minibuses, moto-taxis, and shared trucks often inhale elevated in-cabin pollutant levels (Dons et al., 2012). Because these vehicles are poorly ventilated and lack cabin filters, concentrations PM2.5, CO, and volatile organic compounds can be extremely high, directly impacting the health of low-income transport operators and the public they serve.
• Indigenous and Rural Populations along Transport Corridors: Remote communities near highways or mining-transport routes face rising exposure from long-haul diesel traffic. In some regions, fuel adulteration or illegal fuel dumping exacerbates local pollution and soil contamination, often impacting populations with limited access to healthcare and legal recourse. 

Key Approaches for Equitable Design

Recognizing these overlapping exposure pathways is essential for designing clean-fuel policies that simultaneously protect health, expand opportunity, and advance equality:

• Spatial Prioritization: Map high-exposure and low-income neighborhoods using spatial data, satellite imagery, and local health surveys to prioritize fuel-quality enforcement and air-quality improvements where the benefits will be greatest.
• Financial Inclusion for Transition: Provide targeted financial mechanisms—such as micro-credit, lease-to-own schemes, or scrappage incentives—for small truck, bus, and moto-taxi owners to upgrade to cleaner vehicles or fuels. This is critical to ensure that the cost of modernization does not fall disproportionately on low-income, informal operators, leading to job displacement.
• Mitigate Transition Costs: Integrate social-impact assessments before refinery upgrades, tax reforms, or vehicle-phase-out programs to identify who bears transition costs and how to mitigate them through subsidies or compensatory measures.
• Green Job Pathways: Ensure that retraining and capacity-building programs reach informal transport workers, mechanics, and fuel-station employees, creating new green-job pathways rather than causing job displacement.
• Community Consultation: Engage indigenous and community leaders in consultation processes to ensure fuel-supply reforms and infrastructure investments respect cultural rights and environmental safeguards.
• Social-Inclusion Indicators: Embed social-inclusion indicators in financing frameworks and donor monitoring systems (e.g., proportion of low-income beneficiaries reached, improvements in air-quality indices in high-exposure zones) to track equitable outcomes.