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

===== Main drivers =====
**CO total emissions** show a falling trend over the whole interval, with emission reductions of 81.2 % between 1990 and 2020 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 2020. 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 89% in those categories between 1990 and 2020 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 82% reduction between 1990 and 2020.

__CO Emissions 1990-2020__

^  Total Emissions (kt)                                                                                                                  ||||||||||||||^  Trend: latest compared to                                                                  ||
^  1990                  ^  1995  ^  2000  ^  2005  ^  2010  ^  2011  ^  2012  ^  2013  ^  2014  ^  2015  ^  2016  ^  2017  ^  2018  ^  2019  ^  2020  ^  1990                                            ^  last years                               ^
|                 13.081 |  7.100 |  5.084 |  3.837 |  3.513 |  3.429 |  3.175 |  3.134 |  2.965 |  3.069 |  2.946 |  2.961 |  2.852 |  2.753 |  2.455 |  {{:general:trends:down_green.png|down}} -81.2%  |  {{:general:trends:down_green.png|down}}  |

[{{:general:trends:iir_co_trend.png?direct&600|**CO trend by sector**}}]
[{{:general:trends:iir_co_trend_from_2005.png?direct&600|**CO trend by sector, from 2005**}}]