Chris Turner has reported from the places where the sustainable future first emerged--from green islands in Denmark and green office parks in southern India, to solar panel factories in California and idealistic intentional communities from Scotland to New Mexico. Here, he condenses the first quarter century of the global energy transition into bite-sized chunks of optimistic reflection and reportage, telling a story of a planet in peril and a global effort already beginning to save it. This is a book that moves past the despair and futile anger over ecological collapse and harnesses that passion toward the project of building a twenty-first century quality of life that surpasses the twentieth-century version in every way. How to Be a Climate Optimist overflows with possibility in a moment of great panic, upheaval and uncertainty over a world on fire.