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Silent rooftop wind turbines could generate half of a household's energy needs : TreeHugger
treehugger.com/wind-technology/silent-wind-turbines-could-generate-hal..
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Hot air around a wind turbine » Skepsis Blog
skepsis.nl/blog/2014/08/hot-air-around-a-wind-turbine/

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Link by pjvanerp

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