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

===== Main drivers =====
**CO total emissions** show a falling trend over the whole interval, with emission reductions of 78.2 % between 1990 and 2019 and a stagnation 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 83% reduction between 1990 and 2019. In the Fuel Combustion category, **Road Transport (NFR 1.A.3.b)** is responsible for 61% of the 1990 emissions, with **Passenger Cars (NFR 1.A.3.b.i)** emitting nearly all of it. Reductions of about 87% in those categories between 1990 and 2019 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 30% of 1990 Fuel Combustion emissions with a 82% reduction between 1990 and 2019.

__CO Emissions 1990-2019__

^  Total Emissions (kt)                                                                                                          |||||||||||||^  Trend: latest compared to                                                                  ||
^  1990                  ^  1995  ^  2000  ^  2005  ^  2010  ^  2011  ^  2012  ^  2013  ^  2014  ^  2015  ^  2016  ^  2017  ^  2018  ^  2019  ^  1990                                            ^  last years                               ^
|                 13,204 |  7,181 |  5,147 |  3,921 |  3,621 |  3,555 |  3,295 |  3,255 |  3,091 |  3,194 |  3,061 |  3,082 |  2,957 |  2,881 |  {{:general:trends:down_green.png|down}} -78.2%  |  {{:general:trends:stagnate_yellow.png}}  |

[{{:general:trends:iir_co_trend.png?nolink&600|**CO trend by sector**}}]