The first book to offer a proven, fast, inexpensive, and practical way to cut greenhouse gas emissions and prevent catastrophic climate change. As climate change quickly approaches a series of turning points that guarantee disastrous outcomes, a solution is hiding in plain sight. Several countries have already replaced fossil fuels with low-carbon energy sources, and done so rapidly, in one to two decades. By following their methods, we could decarbonize the global economy by midcentury, replacing fossil fuels even while world energy use continues to rise. But so far we have lacked the courage to really try. In this clear-sighted and compelling book, Joshua Goldstein and Staffan Qvist explain how clean energy quickly replaced fossil fuels in such places as Sweden, France, South Korea, and Ontario. Their people enjoyed prosperity and growing energy use in harmony with the natural environment. They didn't do this through personal sacrifice, nor through 100 percent renewables, but by using them in combination with an energy source the Swedes call käkraft, hundreds of times safer and cleaner than coal. Clearly written and beautifully illustrated, yet footnoted with extensive technical references, Goldstein and Qvist's book will provide a new touchstone in discussions of climate change. It could spark a shift in world energy policy that, in the words of Steven Pinker's foreword, literally saves the world.