!! OMG, of course: Revolving Door Generator !!
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A Dutch cafe, Natuurcafé La Port, has installed a revolving door that is not only heat-efficient but also generates power as you walk through it. It will generate approximately enough energy to power one house. It's not a ton, but it's something!
Via GIZMODO.
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posted by Graydon on Thursday, December 11, 2008
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