*Here Comes the Sun* is an extraordinary, beautifully told, exhaustively researched and argued book about the remarkable progress of solar energy over the past five or so years. McKibben is speaking as much to his fellow activists as he is to the people on the sidelines, trying to get them to understand the quiet, profound changes to solar, to "update their priors" about whether a solar transition is possible, and what impediments stand between us and decarbonization.

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