Mayors from around the world unite in call for sustainable urban data centres
London, UK (23 June 2026) – Data centres, the infrastructure powering the global digital economy, are being built in cities...
Bloomberg Philanthropies commits $45 million to expand clean air efforts as Breathe Cities delivers tangible wins
New support builds on early successes in 14 cities where mayors have deployed nearly 1,200 air quality sensors, implemented 26...
London Climate Action Week 2026 Day 1
Today, mayors, business leaders and climate experts came together across London to kick off London Climate Action Week 2026. From...
Mayor of London opens London Climate Action Week with global fightback against climate disinformation
London, UK (22 June 2026) – The Mayor of London and co-chair of C40 Cities, Sir Sadiq Khan, will today...
Cities take the global stage to showcase climate action at the IMO for the first time
London, United Kingdom (28 April 2026) – From charging infrastructure and municipal climate budgets to green shipping corridors and clean...
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...