“The Climate Smart Cities Challenge is an open innovation competition to identify climate smart solutions to reduce the climate impact of Bogotá, Colombia; Bristol, United Kingdom; Curitiba, Brazil; and Makindye Ssabagabo, Uganda, while creating a better future for all. The climate ambitions of these cities are impressive and addressing them will have a powerful impact in shaping how city leaders, innovators and local communities respond to the climate emergency.” (https://climatesmart.citieschallenge.org/about/)