To be a member of C40, cities must show measurable progress on each of these three missions: cutting emissions by halving fossil fuels by 2030, building resilience, and advancing justice in city climate …

Read through C40’s annual reports, where you’ll find results on emissions, clean air, green jobs, and resilience. Discover plenty of examples of how cities are beating targets, driving real progress, and …

Around the world, C40 mayors and the cities they lead are taking ambitious, collaborative and urgent climate action that aligns with science-backed targets. They work together across borders in order to …

What We Do Raising climate ambition Climate action planning C40 Accelerators Inclusive climate action Research & Knowledge Climate Budgeting Programme

C40’s funders and partners provide critical support and strategic insights to help advance our mission and deliver on our programmatic goals and the climate action taking place across the C40 network.

Learn how C40 cities are transforming food systems to reduce environmental impacts, ensure everyone can access healthy food, and support local food economies.

C40 is led by the elected C40 Chair, the Steering Committee and the Board of Directors.

C40 staff are dedicated, collaborative people from around the world who are committed to tackling the climate crisis and building a future that works for everyone, everywhere.

Dec 20, 2024 · C40’s High-Impact Accelerators help cities take urgent climate action by focusing on key sectors and implementing science-based solutions. By joining, cities demonstrate their commitment …

Learn about recent C40 events featuring global mayors, climate experts, thought leaders and youth activists.