The biggest contributor to global net anthropogenic greenhouse gas (GHG) emissions in 2021 was the energy sector, which released **** billion metric tons of carbon dioxide equivalent (GtCOâ‚‚e) into the atmosphere. Agriculture, forestry, and other land uses was the second-largest source of GHG emissions in 2021. These emissions were mainly released from land use, land use change, and forestry (LULUCF) and enteric fermentation. Meanwhile, global transportation emitted *** GtCOâ‚‚e, with road transportation emissions accounting for more than ** percent of this total.
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WRI, & Systems Change Lab. (November 14, 2023). Greenhouse gas emissions worldwide in 2021, by sector (in billion metric tons of carbon dioxide equivalent) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 20, 2026, from /statistics/1341795/ghg-emissions-by-sector-globally/
WRI, und Systems Change Lab. "Greenhouse gas emissions worldwide in 2021, by sector (in billion metric tons of carbon dioxide equivalent)." Chart. November 14, 2023. ÌÇÐÄÆƽâ°æ. Accessed July 20, 2026. /statistics/1341795/ghg-emissions-by-sector-globally/
WRI, Systems Change Lab. (2023). Greenhouse gas emissions worldwide in 2021, by sector (in billion metric tons of carbon dioxide equivalent). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 20, 2026. /statistics/1341795/ghg-emissions-by-sector-globally/
WRI, and Systems Change Lab. "Greenhouse Gas Emissions Worldwide in 2021, by Sector (in Billion Metric Tons of Carbon Dioxide Equivalent)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 14 Nov 2023, /statistics/1341795/ghg-emissions-by-sector-globally/
WRI & Systems Change Lab, Greenhouse gas emissions worldwide in 2021, by sector (in billion metric tons of carbon dioxide equivalent) ÌÇÐÄÆƽâ°æ, /statistics/1341795/ghg-emissions-by-sector-globally/ (last visited July 20, 2026)
Greenhouse gas emissions worldwide in 2021, by sector (in billion metric tons of carbon dioxide equivalent) [Graph], WRI, & Systems Change Lab, November 14, 2023. [Online]. Available: /statistics/1341795/ghg-emissions-by-sector-globally/
