Fossil fuels are so concentrated that they are literally “energy” in physical form. In contrast, all greentechs require space. Solar is the worst of the bunch: it is roughly one thousand times less dense than systems powered by more conventional means. Consider America’s Megalopolis, the line of densely packed cities from Boston in the north to the Greater DC area in the south. Collectively, the coastal cities of this line comprise roughly one-third of the American population on a tiny footprint. They also happen to be positioned on patches of land with very low solar and wind potential. The
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