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Total global greenhouse gas (GHG) emissions amounted to **** billion metric tons of carbon dioxide equivalent (GtCO₂e) in 2023 (including LULUCF). The largest overall contributor to global GHG emissions that year was power generation, with ** percent. The majority of power sector emissions come from coal-fired power plants.

Largest COâ‚‚ polluting sectors

The power sector was the largest contributor to global CO₂ emissions in 2023, accounting for nearly ** percent of the total emissions. Combined with transportation, these two sectors were responsible for almost ** percent of global CO₂ emissions that year. CO₂ accounts for roughly three-quarters of total greenhouse gas emissions. 

World's largest emitters

China accounted for ** percent of global GHG emissions in 2023, making it the world's largest emitter. China's share of global GHG emissions was equal to the combined contributions of the U.S., EU-27, India, and Russia in 2023.