Greenhouse gas emissions breakdown in the U.S. 2020, by gas
Carbon dioxide is the primary greenhouse gas emitted by human activities in the United States, accounting for 78.8 percent of the country's total greenhouse gas emissions in 2020. The main sources of CO2 emissions are fossil fuel combustion from transportation and power generation.
Methane represented 10.9 percent of U.S. GHG emissions that year. Although CO2 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.
Methane represented 10.9 percent of U.S. GHG emissions that year. Although CO2 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.
