Climate of Hope is a platform for former New York mayor Michael Bloomberg and former head of the Sierra Club Carl Pope to discuss the causes and manners in which we might address climate change. The tone is optimistic — after a review of the causes of global warming and the science behind long-term climate projections, they describe their various successes, including especially the Sierra Club fight to close highly-polluting coal plants in the United States (funded by Bloomberg). The two men then alternate chapters, describing transportation, agriculture, coastal real estate, and other elements of human society challenged by global warming and/or contributing significantly to it. They discuss solutions in each case, especially (in the case of Bloomberg's chapters anyway) solutions that save money or generate profits.
Most of the material will likely be familiar to the people likely to read the book, though perhaps not in such detail. I found myself surprised by only one section of the book, about economic abuses by coal companies in the powder river basin (abetted by the federal government).
The book drags a little towards the end, and it tends to oversimplify some of the challenges. Even the historical review tends to credit good intentions more than it probably should. Yes, a huge number of coal plants were shuttered, but 90% of the credit should probably go to plummeting energy prices, not 100% to the Sierra Club as Pope would probably like you to believe. The final chapter, with its list of problems remaining to solve, is particularly mystifying. The list includes broad categories like "political failures," "monopolies," and "poorly designed incentives," and saying "all we need to do is solve these problems" is a little like saying "colonizing the asteroid belt will be easy once we develop free energy and develop a way to breathe in a vacuum." Listing huge problems is not the same as solving them. I also wish the book had an index.
The book has, I think, two theses: first, that these problems can be solved, and second that city governments are most likely to take the lead. Both points are reassuring and the book is worth reading.