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

Quito Oslo Yokohama Austin Hanoi São Paulo Barcelona Houston Amman Jakarta Rotterdam Addis Ababa Fortaleza Berlin Freetown Ho Chi Minh City Curitiba Guadalajara Beijing Fuzhou Mexico City Nairobi Washington, DC Montréal Accra Rome Lagos Philadelphia Guangzhou Hong Kong Chennai Bogotá Nanjing Quito Oslo Yokohama Austin Hanoi São Paulo Barcelona Houston Amman Jakarta Rotterdam Addis Ababa Fortaleza Berlin Freetown Ho Chi Minh City Curitiba Guadalajara Beijing Fuzhou Mexico City Nairobi Washington, DC Montréal Accra Rome Lagos Philadelphia Guangzhou Hong Kong Chennai Bogotá Nanjing

Seattle Tshwane Tokyo Toronto Copenhagen Johannesburg Buenos Aires Los Angeles Dhaka (North & South) Medellín Sydney Stockholm Mumbai Abidjan Madrid Athens Dalian Phoenix Paris New Orleans Kuala Lumpur Bangkok Bengaluru Singapore Lisbon Wuhan Rio de Janeiro Shenzhen Santiago Delhi NCT Boston Durban (eThekwini) Milan Seattle Tshwane Tokyo Toronto Copenhagen Johannesburg Buenos Aires Los Angeles Dhaka (North & South) Medellín Sydney Stockholm Mumbai Abidjan Madrid Athens Dalian Phoenix Paris New Orleans Kuala Lumpur Bangkok Bengaluru Singapore Lisbon Wuhan Rio de Janeiro Shenzhen Santiago Delhi NCT Boston Durban (eThekwini) Milan

Amsterdam Shanghai Portland Auckland Salvador Quezon City Warsaw Hangzhou Zhenjiang Tel Aviv – Yafo Istanbul Lima Dakar Karachi London Seoul New York City Heidelberg Miami Cape Town Ahmedabad San Francisco Ekurhuleni Dubai Dar es Salaam Melbourne Casablanca Chicago Vancouver Qingdao Chengdu Amsterdam Shanghai Portland Auckland Salvador Quezon City Warsaw Hangzhou Zhenjiang Tel Aviv – Yafo Istanbul Lima Dakar Karachi London Seoul New York City Heidelberg Miami Cape Town Ahmedabad San Francisco Ekurhuleni Dubai Dar es Salaam Melbourne Casablanca Chicago Vancouver Qingdao Chengdu