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 CO₂ 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.