Even ardent supporters acknowledge that the Paris treaty by itself will do little to rein in global warming. The United Nations estimates that if every country were to make every single promised carbon cut between 2016 and 2030 to the fullest extent and there was no cheating, carbon dioxide emissions would still be cut by only one-hundredth of what is needed to keep temperature rises below 3.6 degrees Fahrenheit. The Paris treaty's 2016-2030 pledges would reduce temperature rises around 0.09 degrees Fahrenheit by the end of the century. If maintained throughout the rest of the century, temperature rises would be cut by 0.31 degrees Fahrenheit.