The Climate Smart Cities Challenge is an opportunity for cities to participate as implementation partners in a city-based open innovation competition for cutting-edge solutions to reduce greenhouse gas emissions. Interventions can be across multiple sectors or a combination, such as waste management, food production, energy systems, ecosystems, green space development, and others. The competition invites cities from all around the world to apply with their ideas for creating thriving communities. Selected cities will receive help to reduce greenhouse gas emissions. The deadline for entries is 05 January 2022. Find the challenge