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US carbon dioxide pollution down 3.8 percent

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WASHINGTON (AP) — The United States cut its energy-related carbon dioxide pollution by 3.8 percent last year, the second biggest drop since 1990, the Department of Energy said Monday. The only recent year with a bigger percentage drop was in 2009, when America was in a large recession. American cars and factories spewed 5.83 billion tons of carbon dioxide in 2012, down from 6.06 billion in...