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You are here: Home / Data and maps / Indicators / Energy-related emissions of ozone precursors / Energy-related emissions of ozone precursors (ENER 005) - Assessment published Jan 2011

Energy-related emissions of ozone precursors (ENER 005) - Assessment published Jan 2011

This content has been archived on 12 Nov 2013, reason: Content not regularly updated
Topics: , ,

Generic metadata

Topics:

Energy Energy (Primary topic)

Air pollution Air pollution

Tags:
energy | emissions | ozone precursors
DPSIR: Pressure
Typology: Descriptive indicator (Type A - What is happening to the environment and to humans?)
Indicator codes
  • ENER 005
Dynamic
Temporal coverage:
1990-2007
 
Contents
 

Key policy question: Are energy-related emissions of ozone precursors decreasing?

Key messages

Energy-related emissions account for 75% of all emissions of ozone precursors (CH4, CO, NMVOC, NOX) emissions from the EEA-32 in 2007. These emissions fell by 4.1% between 2006 and 2007 (and by 5.2% in the EU-27). Since 1990, these emissions have declined by 45% in the EU and 41% in EEA member countries. The largest reductions in emissions occurred in the road transport sector, largely as a result of the continued introduction of catalytic converters in new vehicles during this period. Energy production and use still remains a significant source of emissions for all these precursor pollutants. Reducing energy-related emissions of ozone precursors therefore is a key priority for reducing local and transboundary air pollution and in ensuring that the EU and individual countries meet emission ceiling targets under the National Emissions Ceilings Directive (NECD) and the UNECE Gothenburg Protocol.

Sectoral shares of tropospheric ozone precursors (energy and non-energy components) in total emissions, EU-27.

Note: The emissions of ozone precursors (NOx, NMVOC, CO and CH4) are each weighted by an ozone formation factor prior to aggregation to represent their respective ozone forming potentials. The relative impact of the combined contribution of NOx, NMVOC, CO and CH4 to ozone formation can be assessed based on their tropospheric ozone forming potentials (TOFP): nitrogen oxides 1.22, non-methane volatile organic compounds 1.0, carbon monoxide 0.11 and methane 0.014.

Data source:
Downloads and more info

Overall change in emissions of ozone precursors by country, 1990-2007

Note: The graph shows the change in energy-related emissions of ozone precursors (NOx, NMVOC, CO and CH4) each weighted by an ozone formation factor prior to aggregation to represent their respective ozone forming potentials. The relative impact of the combined contribution of NOx, NMVOC, CO and CH4 to ozone formation can be assessed based on their tropospheric ozone forming potentials (TOFP): nitrogen oxides 1.22, non-methane volatile organic compounds 1.0, carbon monoxide 0.11 and methane 0.014 (de Leeuw 2002).

Data source:
Downloads and more info

Changes (%) in emissions of ozone precursors by source category, 1990-2007, EEA-32 (weighted by tropospheric ozone forming potential)

Note: The graph above shows the emissions of ozone precursors (methane CH4; carbon monoxide CO; non-methane volatile organic compounds NMVOCs; and nitrogen oxides NOx) each weighted by a factor prior to aggregation to represent their respective tropospheric ozone formation potential (TOFP). The TOFP factors are: NOx 1.22, NMVOC 1, CO 0.11 and CH4 0.014 (de Leeuw 2002). Results are expressed in NMVOC equivalents (kilotonnes - kt). Data not available for Iceland (emissions of CO, NMVOC, NOx were not reported) and Malta (CO). 'Energy combustion' includes all energy-related emissions minus fugitive.

Data source:
Downloads and more info

Key assessment

In the EEA-32, total trophospheric ozone forming potentials (TOFP) emissions have decreased by 39% between 1990 and 2007 (and by 43% in the EU). All sources except international bunkers have decreased (see Figure 1). Energy-related emissions comprise the majority of TOFP emissions and accounted for 75 % of all TOFP emissions in 2007.

The transport sector is the dominant source of ozone precursors and contributed 38% of total ozone precursor emissions in 2007 (see Figure 2). Road transport has decreased the most with a 57% reduction seen in the EU-27 from 1990 to 2007 (see Figure 1). Decreases in emissions from the transport sector have occurred largely due to the continued introduction of catalytic converters in passenger cars, which reduces emissions of CO and NOx.

Energy industries are a significant source of TOFP emissions, accounting for 11 %, of total TOFP emissions in 2007 (see Figure 2). This sector has reduced its emissions by over 35% in EEA-32 since 1990 (see Figure 1). The decreases in emissions from this sector (primarily NOx) can be attributed to a range of measures, including the increased use of abatement technologies (e.g. selective catalytic reduction (SCR), exhaust gas recirculation (EGR), 3-way catalytic converters), fuel-switching from coal to gas prompted by the liberalisation of the energy market, the requirements of the IPPC and Large Combustion Plant Directives and improved technology efficiencies.

Concerning progress in individual countries, emissions of ozone precursors have decreased significantly in most EEA member countries, with the top reductions measured in Germany, Switzerland and the UK (see Figure 3). Emissions of ozone precursors increased by over 40% in Turkey, Finland and Liechtenstein between 1990 and 2007.  In Turkey nearly half the increase in emissions was from non-road transport, with significant emissions increases also seen from energy industries and manufacturing and construction. Total emissions from Liechtenstein remained small across the period, but increases were seen in from household and services and fugitive emissions despite significant decrease from road transport emissions.  Increases in emissions in Finland were primarily from road transport and manufacturing and construction.

Data sources

More information about this indicator

See this indicator specification for more details.

Contacts and ownership

EEA Contact Info

Cinzia Pastorello

Ownership

EEA Management Plan

2009 2.9.1 (note: EEA internal system)

Dates

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European Environment Agency (EEA)
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