Climate Change and Sustainability
Replicating Denver’s successful air-quality monitoring program
Meet the winning Mayors Challenge cities
How Denver is empowering students to take action on air quality
What a Helsinki competition can teach all idea-seeking cities
Fort Collins looks far into the future to be more innovative today
10 of the top moments from CityLab 2021
Solution Spotlight: Turning garden waste into a carbon sink in Stockholm
Infographic: The Mayors Challenge, by the numbers
Mayors Challenge impact: A look back at previous winners
Why the EU’s ‘innovation capital’ is a model for cities worldwide
6 city innovations that are powering the rollout of electric vehicles
Inspired by Stockholm’s success, a U.S. city goes big on biochar