Mayors lead the way on a climate just transition for cities
Rio de Janeiro, Brazil (4 November 2025) – Mayors, union leaders, and government representatives from around the world met on...
Climate Migration Task Force Meets at C40 World Mayors Summit and Welcomes New Members Karachi and Guadalajara
Rio de Janeiro, Brazil – Ahead of COP30, mayors from across the globe met in person to reaffirm a shared...
C40 supported by IFC and IAPH to unlock sustainable finance for ports and tackle critical funding gap
Rio de Janeiro, Brazil (4 November 2025) – C40 Cities, supported by the International Finance Corporation (IFC) and the International...
Mutirão in action at C40 World Mayors Summit as cities lead the way to COP30
Rio de Janeiro, Brazil (4 November 2025) – As the C40 World Mayors Summit enters its second day, city leaders...
World Mayors Summit Day 1
The World Mayors Summit 2025 opened with a powerful plenary as the Mayors of London, Freetown, and Rio de Janeiro...
There’s something new on climate coming out of China
Mark Watts, Executive Director of C40, explores why China's "irreversible" green transition and growing global ambition are offering a new…