CO₂ emission shares in the EU-27 2022, by sector
Energy supply was the largest source of carbon dioxide (CO₂) emissions in the European Union (EU-27) in 2022, accounting for approximately 31 percent of total emissions. Domestic transportation was the second-largest CO₂ polluter that year, with a share of 28 percent. While the agriculture and waste sectors contribute very little to CO₂ emissions, combined they account for roughly three quarters of EU-27 methane emissions.