[ZR10] Emissions of ozone-precursors
Key message
Emissions of total ozone precursors in Slovenia decreased by 58 % in the period 1990 to 2019. Emissions of nitrogen oxides decreased by 60 %, carbon monoxide by 67 %, non-methane volatile organic compounds by 52 % and methane by 24 %. The reason is mainly the introduction of more stringent emission standards for motor vehicles. This measure contributed to a significant reduction in emissions of nitrogen oxides and carbon dioxide from road transport which is the main source of ozone precursors. Emissions of nitrogen oxides and non-methane volatile organic compounds were in 2019 below the prescribed target values, which must not be exceeded from 2010 onwards.
Definition
This indicator shows the dynamics of emissions of gases causing the formation of ground-level ozone in the period 1990–2019 and the structure of emissions of particular gases by pollution source.
An ozone precursor is a substance that contributes to the formation of ground-level (tropospheric) ozone. Ozone precursors include nitrogen oxides (NOx), carbon monoxide (CO), methane (CH4) and non-methane volatile organic compounds (NMVOC).
Total emissions of substances causing the formation of ground-level ozone are expressed as the sum of emissions of the four pollutants multiplied by corresponding factors of ground-level ozone formation. Emissions are given in NMVOC equivalents.
Charts
National Emission database, GHG Archive, Slovenian Environment Agency, 2021 (21. 07. 2021)
| NOx[index (1990 = 100)] | CO[index (1990 = 100)] | NMVOC[index (1990 = 100)] | CH4[index (1990 = 100)] | ozone precursors - total[index (1990 = 100)] | NOx target value[index (1990 = 100)] | NMVOC target value[index (1990 = 100)] | |
|---|---|---|---|---|---|---|---|
| 1990 | 100 | 100 | 100 | 100 | 100 | ||
| 1991 | 92.63 | 95.18 | 95.12 | 96.22 | 93.95 | ||
| 1992 | 91.74 | 93.86 | 93.18 | 96.88 | 92.64 | ||
| 1993 | 98.29 | 99.67 | 94.17 | 92.55 | 97.06 | ||
| 1994 | 101.87 | 97.26 | 95.69 | 92.32 | 98.88 | ||
| 1995 | 100.54 | 97.50 | 95.78 | 93.46 | 98.33 | ||
| 1996 | 103.00 | 100.86 | 101.24 | 91.82 | 101.94 | ||
| 1997 | 103.68 | 92.40 | 97.14 | 92.49 | 99.42 | ||
| 1998 | 92.13 | 80.98 | 90.48 | 94.60 | 89.68 | ||
| 1999 | 82.80 | 74.82 | 86.16 | 94.78 | 82.69 | ||
| 2000 | 80.11 | 70.62 | 84.96 | 98.47 | 80.30 | ||
| 2001 | 80.61 | 74.43 | 85.87 | 98.69 | 81.51 | ||
| 2002 | 80.03 | 63.25 | 79.66 | 99.74 | 77.18 | ||
| 2003 | 75.30 | 63.84 | 78.97 | 98.46 | 74.79 | ||
| 2004 | 73.41 | 59.57 | 75.68 | 97.12 | 72.01 | ||
| 2005 | 74.24 | 62.92 | 74.73 | 97.14 | 72.65 | ||
| 2006 | 74.97 | 55.51 | 71.42 | 94.32 | 70.57 | ||
| 2007 | 73.04 | 57.55 | 71.40 | 95.08 | 70.00 | ||
| 2008 | 78.02 | 54.79 | 68.36 | 90.52 | 70.82 | ||
| 2009 | 66.24 | 49.04 | 62.86 | 86.98 | 62.30 | ||
| 2010 | 65.49 | 49.24 | 61.72 | 85.76 | 61.57 | ||
| 2011 | 64.34 | 48.15 | 57.81 | 85.44 | 59.48 | ||
| 2012 | 62.23 | 45.98 | 55.51 | 83.45 | 57.30 | ||
| 2013 | 58.53 | 45.64 | 54.18 | 81.15 | 55.00 | ||
| 2014 | 52.83 | 39.00 | 50.20 | 77.22 | 49.75 | ||
| 2015 | 47.65 | 41.63 | 50.66 | 79.62 | 47.91 | ||
| 2016 | 46.86 | 41.38 | 50.95 | 80.98 | 47.59 | ||
| 2017 | 46.08 | 39.64 | 50.34 | 79.13 | 46.70 | ||
| 2018 | 43.88 | 36.00 | 49.97 | 76.51 | 44.88 | ||
| 2019 | 39.84 | 33.21 | 48.23 | 76.00 | 41.87 | ||
| target 2010 | 62.36 | 61.09 |
National Emission database, GHG Archive, Slovenian Environment Agency, 2021 (21. 07. 2021)
| NOx[%] | NMVOC[%] | CO[%] | CH4[%] | |
|---|---|---|---|---|
| 2019 | 45.37 | 13.54 | 39.72 | 1.37 |
National Emission database, GHG Archive, Slovenian Environment Agency, 2021 (21. 07. 2021)
| Energy industries[%] | Manufacturing industries and construction[%] | Road transport[%] | Small combustion[%] | Fugitive emissions from fuels[%] | Industrial processes and product use[%] | Other transport[%] | Agriculture[%] | Waste[%] | |
|---|---|---|---|---|---|---|---|---|---|
| ozone precursors | 5.85 | 8.95 | 25.10 | 21.03 | 1.85 | 15.38 | 9.37 | 11.90 | 0.56 |
| NOx | 12.06 | 11.48 | 44.20 | 9.67 | 0.00 | 0.36 | 13.95 | 8.19 | 0.08 |
| NMVOC | 0.49 | 7.51 | 7.24 | 20.07 | 4.21 | 35.68 | 5.65 | 18.50 | 0.66 |
| CO | 1.36 | 5.60 | 16.02 | 63.48 | 0.00 | 7.67 | 5.86 | 0 | 0.00 |
| CH4 | 0.17 | 0.28 | 0.25 | 5.85 | 13.19 | 0 | 0 | 61.08 | 19.18 |
National Emission database, GHG Archive, Slovenian Environment Agency, 2021 (21. 07. 2021)
| emissions per capita[kg/capita] | |
|---|---|
| Luxembourg | 60.30 |
| Estonia | 51.48 |
| Ireland | 50.95 |
| Latvia | 49.91 |
| Finland | 49.08 |
| Czechia | 48.83 |
| Greece | 47.16 |
| Lithuania | 46.61 |
| Poland | 45.74 |
| Denmark | 42.95 |
| Croatia | 41.11 |
| Austria | 38.51 |
| Slovakia | 37.82 |
| Slovenia | 37.46 |
| Portugal | 36.80 |
| Netherlands | 34.83 |
| Germany | 34.30 |
| Spain | 33.67 |
| France | 32.56 |
| Italy | 32.02 |
| Sweden | 31.80 |
| Cyprus | 31.72 |
| Bulgaria | 31.46 |
| Romania | 31.36 |
| EU28 | 31.25 |
| Hungary | 30.94 |
| Belgium | 30.63 |
| United Kingdom | 30.49 |
| Malta | 19.91 |
Goals
To reduce total national emissions of nitrogen oxides to 45,000 tonnes, sulphur dioxide to 27,000 tonnes, NMVOC to 40,000 tonnes and ammonia to 20,000 tonnes by 2010 as required by the Protocol to Abate Acidification, Eutrophication and Ground-level Ozone (Gothenburg Protocol) to the Convention on Long-range Transboundary Air Pollution (CLRTAP) and Directive 2001/81/EC on the reduction of national emissions of certain atmospheric pollutants (NEC Directive). National emission ceilings should also not have been exceeded since 2010. The revised Gothenburg Protocol and NEC Directive additionally prescribe the reduction of emissions of nitrogen oxides by 39%, sulphur oxides by 63%, non-methane volatile organic compounds by 23%, ammonia by 1% and PM2.5 particles by 25% by 2020 compared to emissions in 2005.