C40 Co-Chair Mayor Aki-Sawyerr champions International Energy Agency’s call for a clean energy transition
C40 Co-Chair and Mayor of Freetown, Yvonne Aki-Sawyerr, has welcomed the International Energy Agency’s (IEA) call for a people-centred clean…
What happened at Climate Week NYC?
C40's highlights from the 2024 Climate Week in New York City
Mayors gather in New York to put cities at the heart of global climate talks
The Mayor of London and Co-Chair of C40 Cities Sadiq Khan will lead an international delegation of mayors representing more...
Mayors, governors and subnational leaders call for greater action on fossil fuels from Heads of State at UN Summit
Ahead of the UN Summit of the Future, mayors are urging Heads of State to step up action and leave…
Eight million climate migrants predicted to arrive in ten Global South cities by 2050 if emissions don’t fall
New research by C40 Cities and partners reveals millions of people could be displaced to ten cities in Africa, South…
Celebrating the winners of the third Students Reinventing Cities competition
Over 1,300 participants from 100 universities joined the third Students Reinventing Cities challenge. Learn about the most recent winners.