CO2 Emissions in the United Kingdom increased to 340610 KT in 2022 from 339060 KT in 2021. CO2 Emissions in the United Kingdom averaged 549995.62 KT from 1960 until 2022, reaching an all time high of 660863.07 KT in 1971 and a record low of 320540.00 KT in 2020.