C40's 2024 annual report is here. Read the foreword written by co-chairs Mayor of London Sadiq Khan and Mayor of Freetown Yvonne Aki-Sawyerr.| C40 Cities
Foreword from the C40-MMC Task Force on Climate and Migration: 2021–2024 Impact Report by Mark Watts and Vittoria Zanuso| C40 Cities
Casablanca, Morocco, is to become the newest member of C40 Cities on 1 January 2025| C40 Cities
More than 70 mayors and city leaders from around the world will arrive in Rio de Janeiro this week for the annual Urban 20 Summit (U20).| C40 Cities
C40 Cities Co-Chairs Mayors Sadiq Khan and Yvonne Aki-Sawyerr and C40 Executive Director Mark Watts reaffirm mayors' commitment to tackling the climate crisis following Donald Trump’s election.| C40 Cities
Through C40’s Youth Reinventing Cities design competitions, youth actively play a role in shaping a greener, more just urban future for all.| C40 Cities
C40 Co-Chair and Mayor of Freetown, Yvonne Aki-Sawyerr, has welcomed the International Energy Agency’s (IEA) call for a people-centred clean energy transition| C40 Cities
Find out what C40 Cities and our global mayors are up to at Climate Week New York City 2024.| C40 Cities
Ahead of the UN Summit of the Future, mayors are urging Heads of State to step up action and leave fossil fuels behind.| C40 Cities