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[ZR10] Emissions of ozone-precursors
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Emissions of total ozone precursors decreased by 52 % in the period 1990 to 2016. Emissions of nitrogen oxides decreased by 48 %, carbon monoxide by 64 %, non-methane volatile organic compounds by 52 % and methane by 14 %. 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 2016 below the prescribed target values, which must not be exceeded from 2010 onwards.

This indicator shows the dynamics of emissions of gases causing the formation of ground-level ozone in the period 1990–2016 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

Figure ZR10-1: Emissions of ozone-precursors, 1990-2016
Sources:

National database on air emissions, Slovenian Environment Agency, 2018

Show data
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 91.87 93.43 95.83 96.58 93.54
1992 93.02 89.90 93.87 98.47 92.79
1993 97.99 94.21 94.70 95.27 96.16
1994 102.08 91.47 96.80 95.38 98.31
1995 100.61 90.87 96.54 96.54 97.44
1996 104.26 93.54 101.99 94.81 101.49
1997 102.55 84.24 96.08 94.62 96.99
1998 92.93 72.12 88.48 96.21 87.69
1999 83.69 64.68 83.23 96.20 80.21
2000 83.01 59.60 80.81 99.58 78.18
2001 82.83 57.99 76.88 98.70 76.45
2002 82.09 56.05 77.50 102.45 75.99
2003 78.51 54.82 75.94 100.81 73.54
2004 76.15 50.47 72.40 100.11 70.43
2005 77.84 49.01 67.45 99.44 69.27
2006 78.35 45.82 67.50 98.21 68.94
2007 76.04 43.30 64.66 98.91 66.43
2008 81.67 41.62 62.52 94.43 68.01
2009 70.49 42.64 59.80 91.34 61.98
2010 68.55 42.89 57.97 90.24 60.48
2011 67.46 41.74 54.24 89.86 58.48
2012 65.31 40.67 51.44 87.88 56.30
2013 62.59 40.36 49.45 85.57 54.27
2014 55.94 34.55 46.72 81.48 49.13
2015 50.29 35.11 47.19 84.04 46.75
2016 51.51 35.95 47.74 85.59 47.68
target 2010 62.31 62.28
Figure ZR10-2: Structure of ozone precursor emissions, by substances, Slovenia, 2016
Sources:

National database on air emissions, Slovenian Environment Agency, 2018

Show data
NOx [%] NMVOC [%] CO [%] CH4 [%]
2016 50.79 13.54 34.32 1.34
Figure ZR10-3: Structure of ozone precursor emissions, by sector, Slovenia, 2016
Show data
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 5.81 7.28 30.58 22.02 1.73 11.57 8.05 12.35 0.62
NOx 10.84 8.61 50.13 9.40 0.00 0.29 10.99 9.69 0.06
NMVOC 0.46 6.78 8.12 23.99 4.55 30.38 5.47 19.44 0.80
CO 1.03 4.27 17.17 65.83 0.00 7.32 4.38 0 0.00
CH4 0.13 0.23 0.27 7.26 12.45 0 0.00 56.37 23.29
Figure ZR10-4: Emissions of ozone-precursors, EU-28 countries, 2016 [in kg/capita]
Show data
emissions per capita [kg/capita]
Luxembourg 67.54
Estonia 58.24
Ireland 55.25
Finland 51.99
Latvia 49.31
Czech Republic 48.10
Lithuania 47.87
Denmark 47.72
Poland 47.31
Austria 44.64
Slovenia 43.25
Greece 41.01
Croatia 38.09
Portugal 37.99
Bulgaria 37.64
Spain 37.21
Sweden 36.85
EU-28 36.16
Germany 34.95
Italy 34.84
Belgium 34.79
Cyprus 34.60
Hungary 34.35
United Kingdom 32.46
Slovakia 32.12
Romania 31.21
Netherlands 30.63
France 29.37
Malta 20.89

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.

Methodology

Date of data source summarization
Other sources and literature

  1. Informative Inventory Report 2018 for Slovenia, Agencija RS za okolje, marec 2018
  2. Slovenia's National Inventory Report 2018 Agencija RS za okolje, april 2018
  3. Direktiva (EU) 2016/2284 o zmanjšanju nacionalnih emisij za nekatera (direktiva NEC)
  4. Uredba o nacionalnih zgornjih mejah emisij onesnaževal zunanjega zraka
  5. Resolucija o nacionalnem programu varstva okolja 2005-2012
  6. Zakon o ratifikaciji protokola o zmanjševanju zakisljevanja, evtrofikacije in prizemnega ozona h konvenciji iz leta 1979 o onesnaževanju zraka na velike razdalje preko meja
  7. The 1999 Gothenburg Protocol to Abate Acidification, Eutrophication and Ground-level Ozone
  8. Uredba o nacionalnih zgornjih mejah emisij onesnaževal zunanjega zraka
  9. Resolucija o nacionalnem programu varstva okolja 2005-2012
  10. Emissions of ozone precursors, Indicator Assessment, CSI 002, Published 27 Jun 2014, Evropska okoljska agencija, 2014
  11. Emissions of air pollutants from transport, TERM 0003, Indicator Assessment, published Dec 2017, Evropska okoljska agencija
  12. de Leeuw, F.A.A.M. (2002), supported by the European topic centre on air and climate change, under contract to the European Environment Agency, A set of emission indicators for long-range transboundary air pollution, Environmental Science & Policy, 5, 135-145
  13. Uredba o vrsti dejavnosti in naprav, ki lahko povzročajo onesnaževanje okolja večjega obsega

Last modified
31.08.2019
Author(s)

Martina Logar, Slovenian Environment Agency