====== Explanation of Key Trends - Carbon Monoxide ======

===== Main drivers =====

**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]__
^                                                                                                                         ||||||||||||||^  Trend: latest compared to                   ||
^  1990   ^  1995  ^  2000  ^  2005  ^  2010  ^  2015  ^  2016  ^  2017  ^  2018  ^  2019  ^  2020  ^  2021  ^  2022  ^  2023  ^  2024  ^  1990                       ^  previous year  ^
|  13 319 |  7 187 |  5 096 |  3 825 |  3 461 |  3 033 |  2 923 |  2 938 |  2 838 |  2 751 |  2 428 |  2 551 |  2 507 |  2 340 |  2 322 |  -82.6%                     |  -0.8%          |

{{ :general:trends:iir_co_trend_from_1990.png?direct&800 | trend of cO emissions, by sector}}
{{ :general:trends:iir_co_trend_from_2005.png?direct&800 | trend of cO emissions, by sector, from 2005}}