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Natural gas is being touted as the climate-friendlier fuel that the United States can use to wean itself off coal, which releases twice the amount of carbon dioxide as natural gas when burned. But the surge of cheap natural gas may not do much to reduce long-term U.S. emissions of carbon dioxide, a new study suggests, because it could delay the deployment of cleaner renewable energy sources such as solar and wind. [Source: Science / AAAS]
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