Every technological development that has brought us to our industrialized, urbanized present must be reevaluated to make today’s greentech work. But by far the biggest challenge is the very existence of cities themselves. All are by definition densely populated, while greentech by definition is not dense. Squaring that circle even in sunny and windy locations will require massive infrastructure to bridge the gap between dense population patterns and far more dispersed greentech electricity-generating systems. Such infrastructure would be on a scale and of a scope that humanity has not yet
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