GREENHOUSE GAS EMISSIONS

This week, the EPA released its 29th annual Inventory of U.S. Greenhouse Gas Emissions and Sinks (GHG Inventory), which presents a national-level overview of annual greenhouse gas emissions from 1990 to 2020. Net U.S. greenhouse gas emissions were 5,222.4 million metric tons of carbon dioxide equivalent in 2020, a nearly 11% decrease in emissions from 2019. The sharp decline in emissions from 2019 to 2020 is largely due to the impacts of the coronavirus (COVID-19) pandemic on travel and economic activity. However, the decline also reflects the combined impacts of several factors, including population trends, energy market trends, technological changes including energy efficiency improvements, and the carbon intensity of energy fuel choices. The GHG Inventory covers seven key greenhouse gases: carbon dioxide, methane, nitrous oxide, hydrofluorocarbons, perfluorocarbons, sulfur hexafluoride, and nitrogen trifluoride. In addition to tracking U.S. greenhouse gas emissions, the Inventory also calculates carbon dioxide that is removed from the atmosphere through the uptake of carbon in forests and other vegetation.