The future of power generation has already begun. One hundred years ago, energy meant steam engines and so on. There was plenty to go around. Electricity was still largely a novelty. Things changed, and by midcentury most of the industrialized world were primarily running on electrical energy produced by hydroelectric power. Hydropower is now essentially working at its limit, and Mother Nature can cripple it with periods of drought. Crude oil is not an inﬁnite resource. Then there are issues of pollution from coal and crude coal and oil. There is tremendous interest in distributed power generation, which conserves resources from climate and is environmental friendly.