Explanation of Key Trends - Carbon Monoxide

CO total emissions show a falling trend over the whole interval, with emission reductions of 82.6 % between 1990 and 2024 and a renewed interval of emission reductions in the last years.

Main driver for CO emissions is Fuel Combustion (NFR 1.A) with 90% of total 1990 emissions and an 87% reduction between 1990 and 2024. Within NFR 1.A, Road Transport (NFR 1.A.3.b) is responsible for 63% of the 1990 emissions, with Passenger Cars (NFR 1.A.3.b.i) emitting more than 90% of it. Reductions of about 90% between 1990 and 2024 result mainly from 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 30% of 1990 Fuel Combustion emissions with a 85% reduction between 1990 and 2024.

Table: Carbon monoxide emissions 1990-2024, in kilotonnes [kt]