Since peaking in 2007 at six billion tons, US carbon dioxide emissions have steadily fallen and were roughly 5 billion tons in 2019, a level first breached in the late 1980s. Falling coal consumption, from a peak of 1,150 million short tons in 2007 to less than 600 million short tons in 2019, is primarily why. Due to Covid-19, 2020 emissions are expected to be just 4.5 billion tons.