What role do cities and their mayors have in combating climate change? With more than half the world’s population living in urban areas and estimates that climate change could cost the world’s major cities twice as much as the rest of the planet – city mayors are dedicated to finding solutions for climate mitigation and resilience. Nearly 50 mayors from cities around the world will convene in Chicago for the Global Covenant of Mayors for Climate and Energy’s North American Climate Summit. The Chicago Council on Global Affairs will host a panel with global city mayors highlighting their efforts to tackle climate change. The panel will be moderated by New York Times columnist Thomas Friedman.