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This book has some excellent concepts on a macro scale but the author really misses some important details making some of the ideas ‘fanciful’. For instance, the author dedicated the better part of a chapter to hydrogen powered cars but never mentions the amount of energy necessary to split hydrogen from water. This seemingly minor fundamentally undermines the feasibility of the first chapter of the book. I am all for alternative fuels but I am also an engineer whom has an appreciation for what is and is not a viable approach. Since this book was published, electric cars have made huge technological advancements because of their overall energy efficiency and use of the existing electric grid for charging. Electric cars can also be charged from solar panels on your home. In any case, the author didn’t do enough homework on some of these concepts and arbitrary attempted to pick winning and losing technologies. The overall concept portrayed is great but the pages dedicated to impractical alternatives detracts significantly from the authors theme.