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

Hong Kong Houston Rome Oslo Athens Barcelona Addis Ababa Tshwane Dhaka (North & South) New Orleans Quito Wuhan Dubai Rotterdam Durban (eThekwini) Vancouver Madrid Johannesburg Mexico City Hangzhou Nanjing Hanoi Amman Karachi Stockholm Sydney Jakarta Curitiba Nairobi São Paulo Lisbon Kuala Lumpur Phoenix Hong Kong Houston Rome Oslo Athens Barcelona Addis Ababa Tshwane Dhaka (North & South) New Orleans Quito Wuhan Dubai Rotterdam Durban (eThekwini) Vancouver Madrid Johannesburg Mexico City Hangzhou Nanjing Hanoi Amman Karachi Stockholm Sydney Jakarta Curitiba Nairobi São Paulo Lisbon Kuala Lumpur Phoenix

Shanghai Guangzhou Salvador Beijing San Francisco Milan Washington, DC Yokohama Istanbul Montréal Dalian Boston Ho Chi Minh City Seoul Tel Aviv – Yafo Auckland Abidjan Kolkata Lima Santiago Los Angeles Zhenjiang Ekurhuleni Toronto Warsaw Chicago Guadalajara Portland Heidelberg Bengaluru Mumbai Buenos Aires Lagos Shanghai Guangzhou Salvador Beijing San Francisco Milan Washington, DC Yokohama Istanbul Montréal Dalian Boston Ho Chi Minh City Seoul Tel Aviv – Yafo Auckland Abidjan Kolkata Lima Santiago Los Angeles Zhenjiang Ekurhuleni Toronto Warsaw Chicago Guadalajara Portland Heidelberg Bengaluru Mumbai Buenos Aires Lagos

Melbourne Medellín Fuzhou Rio de Janeiro Berlin New York City Freetown Fortaleza Philadelphia Miami Quezon City London Accra Dakar Copenhagen Chengdu Qingdao Bogotá Delhi NCT Tokyo Austin Cape Town Ahmedabad Paris Shenzhen Dar es Salaam Amsterdam Singapore Seattle Bangkok Chennai Melbourne Medellín Fuzhou Rio de Janeiro Berlin New York City Freetown Fortaleza Philadelphia Miami Quezon City London Accra Dakar Copenhagen Chengdu Qingdao Bogotá Delhi NCT Tokyo Austin Cape Town Ahmedabad Paris Shenzhen Dar es Salaam Amsterdam Singapore Seattle Bangkok Chennai