In this episode of 22 Minutes With…, Aidan Charron, Associate Director of Global Earth Day, sits down with Managing Director of the C40 Centre for City Climate Policy and Economy and former Mayor of Toronto, David Miller. David talks about his environmental leadership as mayor, his advocacy for “15-minute cities,” and how cities’ voices make an impact on an international level. He also talks about attainable climate strategies and how citizens play an important role in making real change. In addition to his work at C40, David is the author of Solved: How the Great Cities of the World are Fixing the Climate Crisis and is the host of Cities 1.5 podcast.