Table of Contents

Explanation of Key Trends - Carbon Monoxide

Main drivers

CO total emissions show a falling trend over the whole interval, with emission reductions of 81.9 % between 1990 and 2023 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 86% reduction between 1990 and 2023. 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 2023 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 84% reduction between 1990 and 2023.

Table: Carbon monoxide emissions 1990-2023, 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 -81.9% -6.2%

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