C40 is a global network of mayors of the world’s leading cities that are united in action to confront the climate crisis.

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Washington, DC Milan Chennai Paris Guadalajara Ho Chi Minh City Chengdu Nairobi Nanjing Amman Barcelona Karachi Medellín Guangzhou Boston Seattle Tel Aviv – Yafo Delhi NCT Phoenix Rotterdam Montréal Fortaleza Tokyo Istanbul London Hanoi Rio de Janeiro Casablanca Wuhan Cape Town Toronto Washington, DC Milan Chennai Paris Guadalajara Ho Chi Minh City Chengdu Nairobi Nanjing Amman Barcelona Karachi Medellín Guangzhou Boston Seattle Tel Aviv – Yafo Delhi NCT Phoenix Rotterdam Montréal Fortaleza Tokyo Istanbul London Hanoi Rio de Janeiro Casablanca Wuhan Cape Town Toronto