Carbon dioxide emissions from the U.S. power sector fell 10 percent between 2019 and 2020, according to the 17th and latest edition of Benchmarking Air Emissions of the 100 Largest Electric Power Producers in the United States, which was released last week. The drop is the largest year-over-year decrease in greenhouse gas emissions since the initial report was issued in 1997. Further, CO₂ emissions are shown to be down 20 percent from 1990 levels and 40 percent from their 2007 peak.

The 48-page analysis—which combines generation and fuel consumption data from the Energy Information Administration with emissions data on CO₂, sulfur dioxide (SO₂), nitrogen oxides (NOx), and mercury from the Environmental Protection Agency—was authored by M.J. Bradley & Associates, a consulting firm focused on energy and environmental issues. Listed as “contributors” to the report are Bank of America, the nonprofit organization Ceres, energy producers Entergy and Exelon, and the Natural Resources Defense Council.