Value proposition

C40 is a network of nearly 100 world-leading cities taking urgent action to confront the climate crisis. 🌳 🚴‍♀️

C40 is a network of nearly 100 mayors of the world’s leading cities who are working to deliver the urgent action needed right now to confront the climate crisis and create a future where everyone, everywhere, can thrive. Mayors of C40 cities are committed to using a science-based and people-focused approach to help the world limit global heating to 1.5°C and build healthy, equitable and resilient communities. Through a Global Green New Deal, mayors are working alongside a broad coalition of representatives from labour, business, the youth climate movement and civil society to go further and faster than ever before.

The current Chair of C40 is Mayor of London Sadiq Khan; and three-term Mayor of New York City Michael R. Bloomberg serves as President of the Board. C40’s work is made possible by our three strategic funders: Bloomberg Philanthropies, Children’s Investment Fund Foundation (CIFF), and Realdania.

Member City Government Support, Peer-to-Peer Networking, Environmental Programmes, Policies, and Projects, Research and Data Services, Environmental Communications, Knowledge Management, Climate Change Advocacy, Greenhouse Gas Reductions, and Adaptation and Resilience