Explanation of Key Trends - Carbon Monoxide

Main drivers

CO total emissions show a falling trend over the whole interval, with emission reductions of 80.9 % between 1990 and 2022 and a renewed interval of emission reductions in the last years.

The Main Driver for CO emissions is Fuel Combustion (NFR 1.A) with 90% of total 1990 emissions and an 85% reduction between 1990 and 2022. In the Fuel Combustion category, Road Transport (NFR 1.A.3.b) is responsible for 57% of the 1990 emissions, with Passenger Cars (NFR 1.A.3.b.i) emitting nearly all of it. Reductions of about 90% in those categories between 1990 and 2022 are mainly due to constantly improving fuels and increasingly stricter regulations resulting in technical improvements.

Other Sectors (NFR 1.A.4, including commercial/institutional and residential sources) are responsible for about 27% of 1990 Fuel Combustion emissions with a 81% reduction between 1990 and 2022.

Table: Carbon monoxide emissions 1990-2022, in kilotonnes [kt]

Trend: latest compared to
1990	1995	2000	2005	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023	1990	previous year
13 321	7 188	5 097	3 790	3 590	3 462	3 364	3 349	3 134	3 177	3 050	3 030	2 927	2 839	2 479	2 607	2 568	2 409	-80.9%	-2,2%

trend of cO emissions, by sector trend of cO emissions, by sector, from 2005