Trying to sell electricity to a power company may seem like a quixotic gesture, but for 18 months a modern-day Man of La Mancha, Martin Greenwald of Thompson Ridge, N.Y., has been doing his best. His $4,000 windmill stands on a 44-ft. tower behind the barn on his small farm and generates only 2 kw of power. But when the wind is right (about 15 m.p.h.), he has electricity to spare. So in 1977, Greenwald, 36, an assistant professor of industrial technology at Montclair State College, offered to sell his excess power to Orange...
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