Design By: Good
Sources: The Alliance for Climate Protection; Central Oregon Environmental Center; Environmental Literacy Council; James E. Hansen of the NASA Goddard Institute for Space Studies; Momgabay.com; National Geographic; NaturalResources Defense Council; Solar Energy International; U.S. Bureau of Transportation Statistics; U.S. Census Bureau; U.S. Department of Energy; U.S. Energy Information Administration; U.S. Environmental Protection Agency; World Resources Institute.
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