From Mayor Michael Bloomberg and former head of the Sierra Club Carl Pope comes a manifesto on how the benefits of taking action on climate change are concrete, immediate, and immense. The 2016 election left many people who are concerned about the environment fearful that progress on climate change would come screeching to a halt. But not Michael Bloomberg and Carl Pope. They approach climate change from different perspectives, yet they arrive at similar conclusions: without agreeing on every point, they share a belief that cities, businesses, and citizens can lead—and win—the battle against climate change, no matter which way the political winds in Washington may shift. In Climate of Hope, Bloomberg and Pope offer an optimistic look at the challenge of climate change, the solutions they believe hold the greatest promise, and the practical steps that are necessary to achieve them. Writing from their own experiences and sharing their own stories from government, business, and advocacy, Bloomberg and Pope provide a road map for tackling the most complicated challenge the world has ever faced. Along the way, they turn the usual way of thinking about climate change on its head: from top down to bottom up, from partisan to pragmatic, from costs to benefits, from tomorrow to today, and from fear to hope. Bloomberg and Pope explore climate change solutions that will make the world healthier and more prosperous.