May 1, 2024

Total US GHG emissions grew from just under 6,500 Mt CO2eq in 1990 to about 7,500 Mt CO2eq in 2007. They generally trended downward thereafter dropping to 6,600 Mt CO2eq by 2019.

In 2020, US GHG emissions hit their lowest point since 1990 at about 6,000 driven by the impact of the Covid pandemic. Post-pandemic, they have increased slightly to 6,400 Mt CO2eq  in 2022.

Despite the recent uptick, Incorrys expects US GHG emissions to continue its general downtrend that started in 2007.

Historically, US GHG emissions have consisted of 80% Carbon Dioxide (CO2), 12% Methane (CH4), 6% Nitrous Oxide (N2O), and 2% other.

*Land Use, Land Use Change and Forestry (LULUCF)


Organization for economic co-operation and development. 2023. Available at

EPA. 2022. Inventory of Green House Gas Emissions and Sinks. Available at