University of Michigan environmental scientist Rosina Bierbaum: “The U.S. is well behind other countries in having the cleanest and most sustainable environment.”

The U.S. emits more carbon dioxide than any other nation except China. In 2014, the U.S. spewed 237 times more carbon dioxide into the air than Sweden, according to figures by the U.S. Department of Energy’s Oak Ridge National Laboratory.

The U.S. is No. 2 in per person carbon dioxide pollution, behind Luxembourg, among 35 developed nations plus China, India and Brazil, Energy Department data show. That’s 19.1 tons (17.3 metric tons) of carbon dioxide per year for the average American, compared with 4.9 tons (4.5 metric tons) for the average Swede.

The U.S. ranks tenth highest in carbon pollution per gross domestic product according to the International Energy Agency. The U.S. spews almost five times more carbon dioxide per dollar in the economy than Sweden.

William K. Reilly, former EPA head, says Trump is "just wrong."