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i guess this says everything: “But because renewables represent such a tiny part of energy production, doubling their use will take only a small bite out of demand for fossil fuels. Petroleum, coal and natural gas will still meet 83 percent of total U.S. primary energy supply requirements in 2030, down only slightly from 85 percent in 2006.” this is only a drop in the ocean. besides china the usa is the biggest polluter on earth….