This Assessment is a global analysis that brings together climate change and air pollution within a single economic framework. It provides new evidence on the scale of economic, health and development benefits from acting on these challenges, intended to inform fiscal policy, public investment decisions, and economic planning, particularly for ministries of finance. It also serves as a resource fo...

Clean Air Wins was a campaign supported by C40 Cities and the UK Healthy Air Coalition, which ran from April to September 2023. The central goal of the campaign was to activate public, partner, and grassrootssupport on clean air. By counteracting misinformation and disinformation, it aimed to help people better understand the issue, offer a soft landing for the expansion of London Ultra Low Emissi...

In cities around the world, ambitious air quality action is possible when it reflects how people live, work, and move. Community engagement makes this happen by bringing residents into the policies and programmes that affect their lives. It helps cities design and implement them more effectively and sustain action over time.Through grassroots and city-driven community engagement, Breathe Cities is...

The aim of this guide is to provide simple guidance and practical tips for practitioners planning effective disaster risk communication strategies that support early warning and early action.It will help you maximise investments in risk communication by:Designing communication that reflects behavioural science and informed decision-making among populationsCollaborating with practitioners across di...

The handbook supports the implementation of EW4All Pillar 1, which focuses on strengthening the use of risk knowledge globally. It serves as a practical guide for practitioners to incorporate targeted, contextual risk information—encompassing hazard, vulnerability, and exposure data—into every stage of the early warning system process. This ranges from risk-based forecasting, to defining communica...

This checklist is structured around the four key elements of early warning systems:disaster risk knowledge based on the systematic collection of data and disaster risk assessments; detection, monitoring, analysis and forecasting of the hazards and possible consequences; dissemination and communication, by an official source, of authoritative, timely, accurate and actionable warnings and ...

How can the communication of risk and early warnings result in early actions by all at-risk groups?The present report presents findings from the Risk Communication Working Group, which are consolidated into five key components for effective early warning and early action (EWEA) communication. Such communication requires:An in-depth understanding of the broader information ecosystemA community-cent...

This Wildfire Smoke Air Pollution Emergency Plan has been developed as an adaptation tool to help Sacramento County residents, businesses, schools and public agencies prepare and protect themselves from regular and ongoing exposure to wildfire smoke. The Emergency Plan includes general information on air quality, forecasting and monitoring and provides a basic understanding of health impacts from ...

The present study aimed at performing PM10 source apportionment, using positive matrix factorization (PMF), based on filter samples collected every 4 h at a sub-urban station in the Paris region (France) during a PM pollution event in March 2015 (PM10 N 50 μgm−3 for several consecutive days). The PMF model allowed to deconvolve 11 source factors. The use of specific primary and secondary organic m...

Delhi’s post-monsoon and winter haze reduces visibility, causes health hazards, and interrupts usual routines. Multiple source apportionment (SA) studies recently apportioned sources and discussed organic and elemental PM source characteristics independently. To design effective pollution control strategies, it’s important to obtain a comprehensive picture of particulate matter (PM2.5) sources by ...