Key figures
Energy-related CO₂ emissions
4,909
Million metric tons · 2021
Transportation CO₂ emissions
1,814
Million metric tons · 2021
Historical data
Pick an indicator to see its long-run evolution.
Energy-related CO₂ emissions
1970–20214,909▲ 16%
Sum of the 50 states (+ DC where reported). U.S. EIA State Energy Data System, all sectors and fuels (FRED EMISSCO2TOTVTTTOFLA).
Sources: BEA, BLS, Census Bureau, EIA, FBI, USDA, NCES, U.S. Treasury and other federal agencies (via FRED where noted). National totals marked “Sum of the 50 states” add up official state figures.