Renewable energy use surged worldwide last year

Renewable energy reached a big milestone in 2011, surging to a record $257 billion in global investments, the U.N. Environment Program announced, up 17 percent from 2010 and a sixfold increase over the past seven years. The figure also marks a breakthrough for the solar power industry, which drew nearly twice as much investment as wind energy last year, according to reports from the U.N. and the Renewable Energy Policy Network for the 21st Century (REN21).

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