The following is a guest essay originally posted at AlterNet by David Morris, vice president of the Institute for Local Self-Reliance. Some 30 years ago NASA came up with another big idea: assemble vast solar electric arrays in space and beam the energy to earth. The environmental community did not dismiss NASA's vision out of hand. After all, the sun shines 24 hours a day in space. A solar cell on earth harnesses only about four hours equivalent of full sunshine a day. If renewable electricity could be generated more cheaply in space than on earth, what's the problem? A …
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