C40 is proud to announce the winning projects of this year’s global youth design challenge Youth Reinventing Cities (formerly ...
Through the C40 Cool Cities Accelerator, mayors showed how fast-moving local action saves lives: Building on a successful pilot, New York City has secured $350,000 to roll out its cooling pop-ups for ...
Read the foreword for the C40 Cities Annual Report 2025, written by the C40 Co-Chairs, Mayor of London Sadiq Khan and Mayor of Freetown Yvonne Aki-Sawyerr The C40 Steering Committee meeting takes ...
Yearly offer of action - C40 Cities Yearly offer of action ...
As New York Climate Week comes to a close, one message stood out above the rest: mayors aren’t waiting for the future. They’re acting now. Across energy, housing, extreme weather and resilience, city ...
Nearly 1 billion people live in C40 cities. Mayors see firsthand the challenges people face and the solutions that ...
New York U20 concludes with calls for greater powers, finance and partnerships for cities to deliver on housing, climate ...
US cities now make up nearly half the endorsers (22 out of 49 cities) of the Global Urban Data Centres Pact, a mayor-led initiative, co-founded by Mayor Kate Gallego of Phoenix and Melbourne’s Lord ...
New York, USA (19 September 2026) – Mayor Zohran Mamdani will welcome mayors from across the United States and around the world to New York this weekend, as city leaders unite for practical action on ...
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