FILE - This June 1, 2014, file photo show the coal-fired Plant Scherer in operation in Juliette, Ga. Despite what President Donald Trump says, scientists have long known that what's warming the planet isn't natural. It's us. Climate scientists say Trump was wrong. There are several ways they know that more than 90 percent of climate change is caused by emissions of heat-trapping gases from activities like burning coal and natural gas for electricity, or burning gasoline, diesel and jet fuel for transportation. In other words, humans. (AP Photo/John Amis, File)
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