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Sub-Topics Causes of Global Warming News -02-27-06 Voluntary Cuts in Greenhouse Gases Not Working (ABC News) "U.S. emissions of gases blamed for global warming rose 1.7 percent in 2004, as the country burned more fossil fuel for transportation and electricity, according to federal environment regulators." "The EPA did not indicate how U.S. emissions would fare in the future, but climate researchers say voluntary cuts won't trim overall greenhouse output in the United States." 02-06