Global Breathe Cities Network Set To Expand Following $45m Investment

A $45 million investment from Bloomberg Philanthropies is set to supercharge the global Breathe Cities network, a flagship initiative tackling the silent pandemic of urban air pollution. The funding will expand the coalition of cities committed to monitoring and cutting harmful emissions, directly targeting the world’s biggest environmental health risk.

Bloomberg Philanthropies announced the $45 million injection in June 2026, earmarked for scaling the Breathe Cities network. The initiative, launched in 2023, already spans 15 cities across five continents, using real-time sensors, data dashboards, and policy advocacy to drive measurable improvements in air quality. The new money will allow the network to add up to 10 more cities over the next three years, focusing on regions with the highest pollution burdens, such as South Asia and sub-Saharan Africa.

Air pollution is responsible for an estimated 7 million premature deaths each year, according to the World Health Organization, and 99% of the world’s population breathes air that exceeds safe limits. Cities are both the source and the solution: they account for 70% of global CO₂ emissions yet are where policy changes can have the fastest impact. Breathe Cities was co-founded by Bloomberg Philanthropies, C40 Cities, and the Clean Air Fund to bridge the gap between data and action.

The investment will fund expanded monitoring networks, technical support for city officials, and public awareness campaigns. Michael Bloomberg, UN Special Envoy on Climate Ambition and founder of Bloomberg Philanthropies, has made clean air a centerpiece of his philanthropic work. The network’s current members include London, Paris, Accra, Jakarta, and Warsaw, each reporting measurable drops in PM2.5 levels after adopting evidence-based policies like low-emission zones and stricter industrial regulation.

Experts note that the Breathe Cities model is uniquely effective because it combines rigorous science with political will. By providing cities with standardized tools and a platform to share best practices, the network accelerates the adoption of proven measures. The $45 million boost signals growing confidence among philanthropists that city-level action on air quality yields outsized returns in both health and climate benefits.

Looking ahead, the expanded network will prioritize cities in Africa and South Asia, where pollution levels are highest and resources are scarcest. Bloomberg Philanthropies has committed to tracking progress through a public scorecard, with cities required to report annual air quality data. If current trends hold, the network could prevent thousands of premature deaths and serve as a template for global urban health interventions. The challenge now is to turn data into durable policy — and this investment gives more cities the tools to try.