This July 1, 2013 file photo smoke rises from the Colstrip Steam Electric Station, a coal burning power plant in in Colstrip, Mont. The Supreme Court on Monday placed limits on the sole Obama administration program already in place to deal with power plant and factory emissions of gases blamed for global warming. The justices said that the Environmental Protection Agency lacks authority in some cases to force companies to evaluate ways to reduce carbon dioxide emissions. This rule applies when a company needs a permit to expand facilities or build new ones that would increase overall pollution. Carbon dioxide is the chief gas linked to global warming. (AP Photo/Matthew Brown, File)
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