C40 Cities calls for COP30 to raise ambition and progress plan to phase out fossil fuels
Cities call on national governments to partner in an ambitious, just energy transition that delivers real change beyond COP30. C40...
World Mayors Summit Day 3
We do this for our today, we do this for our tomorrow, and we will do this together. This was...
Brazil, C40 Cities, and the Global Covenant of Mayors announce new mutirão effort to accelerate urban climate solutions in Brazil
Supported by Bloomberg Philanthropies and facilitated by the Brazilian National Front of Mayors (FNP), the partnership will help 50 Brazilian...
World Mayors Summit Day 2
Cooler cities, transformed food systems, and climate-focused urban planning. At the 2025 World Mayors Summit, C40 Cities announced three new...
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...