Over 97% of scientists worldwide overwhelmingly agree that climate change is causes by man-made activity. Seventy percent of Americans agree, according to a 2016 poll from Yale University. Still, the U.S. is the only country to reject the Paris Agreement, the government proposed to scrap the Clean Power Plan and the EPA eliminated the climate change section of their website. Watch as distinguished climate scientist, Michael E. Mann, Ph.D., discusses the realities of climate change.