U.S. current and historical contributions to climate change and emissions 1850-2021
The United States is responsible for almost 20 percent of global historical cumulative fossil and LULUCF carbon dioxide emissions from 1850 to 2021. During this period, the North American country contributed roughly 17 percent of global warming, despite representing just four percent of the current world population. The United States is the biggest contributor to global warming from 1850 to 2021.