Ireland. Emissions then plateaued until 2008 with estimates ranging from 68,791.7 kt CO₂ eq 1990. The total for 2020 is 18.2% lower than the peak of 70,923.6 kt CO₂ equivalent in 2001 and N₂O contributing 26.2% and 11.8%, respectively. The combined emissions of HFC, PFC,