Source: Seth Borenstein, WRAL, 8/15/16

Tempers are rising in America, along with the temperatures. Two decades ago, the issue of climate change wasn't as contentious. The leading U.S. Senate proponent of taking action on global warming was Republican John McCain. George W. Bush wasn't as zealous on the issue as his Democratic opponent for president in 2000, Al Gore, but he, too, talked of regulating carbon dioxide. 

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