The Climate Smart Cities Challenge is an opportunity for cities to participate as implementation partners in a city-based open innovation competition that will invite a global pool of technologists, businesses and investors to develop, test and scale cutting-edge solutions to reduce greenhouse gas emissions and create a better future for all.

These could include a wide range of interventions across multiple sectors or a combination, such as urban form and physical design, transport, waste management, food production, energy systems, housing, ecosystems, use of public space and others. Challenges that are carbon-negative are suitable as well (e.g. green space development).