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Posted: April 11th, 2008, 6:00am CEST
Carbon dioxide is the most important human-produced gas contributing to global climate change, and the
United States accounts for about 25 percent of global CO2 emissions.
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Posted: April 11th, 2008, 6:00am CEST
Carbon dioxide is the most important human-produced gas contributing to global climate change, and the
United States accounts for about 25 percent of global CO2 emissions.