São Paulo and Rio de Janeiro gather global cities to influence G20 at Urban 20 Summit of Mayors
Representatives from over 30 cities convened in Brazil for the Urban 20 (U20) 2024 Mayors’ Summit in São Paulo earlier…
In Focus: London’s global climate leadership
As London Climate Action Week 2024 approaches, join us in celebrating the city’s achievements. Under the leadership of C40 Co-Chair...
Urban loss and damage
How cities are taking inclusive climate action to create an equitable, safe and thriving future for all.
Pope Francis and C40 mayors chart course for climate resilience
C40 mayors met His Holiness Pope Francis for the Vatican's climate resilience summit and made a united call for stronger…
C40 releases 2023 Annual Report
Read the foreword by the C40 Co-Chairs, Mayor of London Sadiq Khan and Mayor of Freetown Yvonne Aki-Sawyerr
Building resilient and inclusive African cities
Lessons from C40's masterclass on loss and damage and inclusive climate action in Addis Ababa