October 16, 2021
Chart shows US methane (CH4) emissions by industry sector from 1990 to 2019. CH4 emissions from landfills decreased by 35.2 due to landfill gas collection and control systems, and a reduction of decomposable materials.
One of the largest contributors to CH4 emissions is enteric fermentation (the natural part of the digestive process in ruminant animals) from domestic livestock remained relatively flat.
Source:
EPA. 2019. Inventory of Green House Gas Emissions and Sinks. https://www.epa.gov/ghgemissions/inventory-us-greenhouse-gas-emissions-and-sinks-1990-2019 and Incorrys Data