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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Portland Yokohama Freetown Madrid Buenos Aires Milan Mexico City Bogotá Washington, DC Kuala Lumpur Lisbon Delhi NCT Athens Hong Kong London Houston Qingdao Lagos Warsaw Nanjing Tokyo Rio de Janeiro Nairobi Ekurhuleni Amman Bengaluru Durban (eThekwini) Dalian Dakar Cape Town Stockholm Portland Yokohama Freetown Madrid Buenos Aires Milan Mexico City Bogotá Washington, DC Kuala Lumpur Lisbon Delhi NCT Athens Hong Kong London Houston Qingdao Lagos Warsaw Nanjing Tokyo Rio de Janeiro Nairobi Ekurhuleni Amman Bengaluru Durban (eThekwini) Dalian Dakar Cape Town Stockholm