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As the U.S. energy industry inches away from reliance on fossil fuels, experts have heralded various greener technologies, such as ethanol, solar and geothermal power, as choice alternatives. And while each of those alternatives holds marked environmental advantages over dirty oil and coal, none match wind power's squeaky clean performance.

"Based on the review looking at the major energy technologies and environmental impact, wind came out on top," said Mark Z. Jacobson, an engineer at Stanford University.

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