Global greenhouse gas emissions shares 2023, by sector

Global greenhouse gas emissions amounted to roughly 57 billion metric tons of carbon dioxide equivalent (GtCO₂e) in 2023. The power sector was the biggest global contributor to GHG emissions that year, with a share of 26 percent. The majority of emissions from electricity production come from coal-fired power plants. Transportation was the second-largest source of global GHG emissions in 2023, with road vehicles the biggest polluters.