Carbon dioxide (COâ‚‚) is the primary greenhouse gas (GHG) emitted from human activities in the United States, accounting for roughly ** percent of the country's total gross GHG emissions in 2022. The main sources of COâ‚‚ emissions are fossil fuel combustion from transportation and power generation.Â
Methane represented ** percent of U.S. GHG emissions that year. Although COâ‚‚ is the most abundant GHG, methane is more effective at trapping heat in the atmosphere. The main sources of methane emissions in the U.S. are enteric fermentation, natural gas systems, and landfills.
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Environmental Protection Agency. (April 11, 2024). Distribution of total gross greenhouse gas emissions in the United States in 2022, by type of gas [Graph]. In ÌÇÐÄÆÆ½â°æ. Retrieved July 31, 2026, from /statistics/521029/share-of-us-greenhouse-gas-emissions-by-gas-type/
Environmental Protection Agency. "Distribution of total gross greenhouse gas emissions in the United States in 2022, by type of gas." Chart. April 11, 2024. ÌÇÐÄÆÆ½â°æ. Accessed July 31, 2026. /statistics/521029/share-of-us-greenhouse-gas-emissions-by-gas-type/
Environmental Protection Agency. (2024). Distribution of total gross greenhouse gas emissions in the United States in 2022, by type of gas. ÌÇÐÄÆÆ½â°æ. ÌÇÐÄÆÆ½â°æ Inc.. Accessed: July 31, 2026. /statistics/521029/share-of-us-greenhouse-gas-emissions-by-gas-type/
Environmental Protection Agency. "Distribution of Total Gross Greenhouse Gas Emissions in The United States in 2022, by Type of Gas." ÌÇÐÄÆÆ½â°æ, ÌÇÐÄÆÆ½â°æ Inc., 11 Apr 2024, /statistics/521029/share-of-us-greenhouse-gas-emissions-by-gas-type/
Environmental Protection Agency, Distribution of total gross greenhouse gas emissions in the United States in 2022, by type of gas ÌÇÐÄÆÆ½â°æ, /statistics/521029/share-of-us-greenhouse-gas-emissions-by-gas-type/ (last visited July 31, 2026)
Distribution of total gross greenhouse gas emissions in the United States in 2022, by type of gas [Graph], Environmental Protection Agency, April 11, 2024. [Online]. Available: /statistics/521029/share-of-us-greenhouse-gas-emissions-by-gas-type/