May 1, 2024

The electric power sector generated the most CO2 emissions in the US through 2016, accounting for about 37% of the total. Since then, as more coal generation is shuttered and renewables are brought online, it has dropped below the transportation sector and accounted for 25% of total CO2 emissions in 2022.

Over the past 3 years, the transportation sector has also seen a decline in its contribution to the total CO2 emissions – dropping from its average of 34% (2015-2019) to 29% driven by new clean fuel regulations.

The Industrial sector ranked 3rd in CO2 emissions and increased to 24% over the past 3 years from their historical range of 15% prior. Similarly, Agriculture and Commercial contributions to CO2 emissions increased over the past few years from 7% the range to 10% for agriculture and 4% to 7% for commercial.

The Residential sector has steadily contributed about 6% of the total CO2 emissions.


  1. Organization for economic co-operation and development. 2023. Available at
  2. EPA. 2022. Inventory of Green House Gas Emissions and Sinks. Available at