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Science 15 September 2006:
Vol. 313. no. 5793, p. 1549
DOI: 10.1126/science.313.5793.1549a
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In 2000, the last year for which comprehensive data are available, the United States emitted a fifth of the world's greenhouse gases, or 6928 million tons equivalent CO2. China's output almost equals those of India, Canada, Russia, and South Korea combined. The World Resources Institute created this map to show how different U.S. regions compare with top world emitters, with total emissions shown in millions of tons equivalent CO2.

Figure 1
CREDIT: SOURCE: WORLD RESOURCES INSTITUTE




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Science. ISSN 0036-8075 (print), 1095-9203 (online)