redOrbit: Global investment in renewable energy was a record high $257 billion in 2011, with solar leading the pack, according to two new reports on renewable energy trends issued by the United Nations Environment Program (UNEP) and the Renewable Energy Policy Network for the 21st Century (REN21). Global Trends in Renewable Energy Investment 2012 is the fifth edition of the UNEP report, based on data from Bloomberg New Energy Finance, and has become the standard reference for global clean energy investment…

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