FILE - In this Nov. 15, 2016, file photo, a haul truck with a 250-ton capacity carries coal from the Spring Creek strip mine near Decker, Mont. As President Donald Trump touts new oil pipelines and pledges to revive the nation's struggling coal mines, federal scientists are warning that burning fossil fuels is already driving a steep increase in the United States of heat waves, droughts and floods. (AP Photo/Matthew Brown, File)
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