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Energy-related emissions account for only 2% of NH 3 emissions but 96% of NO x and 94% of SO 2 emissions in the EEA-32 in 2009. They fell by 17%, 13% and 21% respectively between 2005 and 2009 in EEA-32 countries. Since 1990, these energy related emissions declined by 40% and 78% for NO x and SO 2 respectively but increased by 88% for NH 3 in the EU-27 and declined by 37% (NO x ) and 74% (SO 2 ) and increased by 92% (NH 3 ) in EEA-32 member countries. However as noted earlier the percentage of energy related NH 3 emissions are insignificant compare do the non-energy related NH 3 emissions. Most of the total reduction in pollutants contributing to acid deposition since 1990 is accounted for by lower SO 2 emissions from the energy-producing sector and lower NO x emissions from the transport sector. The EU-27 is broadly on track to meet its overall targets set under the NEC Directive (NECD) [1] , however further reductions are needed to improve remaining local and transboundary air pollution issues, and for ensuring that individual countries meet emissions ceiling targets under the NECD and the UNECE Gothenburg Protocol. [1] See Pollutant Specific Factsheet NOx
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Energy-related emissions accounted for 87% of all Carbon Monoxide (CO) emissions, 43% of all Non-Methane Volatile Organic Compounds (NMVOC) emissions, 96% of all Nitrogen Oxide (NO x ) emissions and 4.7% of all Methane (CH 4 ) emissions from the EEA-32 in 2009. Since 1990(2005), these emissions have declined by 58(13)%, 63(13)%, 37(13)% and 22(+8)% in EEA member countries. The largest reduction 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 and more stringent regulations on emissions.
Energy-related emissions of primary particulate matter, PM 10 and PM 2.5 , account for 68% and 81% of total PM 10 and PM 2.5 emissions respectively in the EEA-32 in 2009. These energy related emissions fell by 7% and 10% respectively between 2005 and 2009 and 31% and 35% between 1990 and 2009. The most important reductions were achieved in the energy supply sectors (Energy Industries and Fugitive emissions) as a result of fuel switching from coal and oil to natural gas.
Emissions of the acidifying pollutants (nitrogen oxides (NO X ), sulphur oxides (SO X ) and ammonia (NH 3 ) have decreased significantly in most of the individual EEA member countries between 1990 and 2009. Emissions of SO X have decreased by 76%, NO X by 41% and NH 3 emissions by 26% since 1990. The EU-27 is on track to meet its overall target to reduce emissions of SO X and NH 3 as specified by the EU’s National Emissions Ceiling Directive (NECD). However a number of individual Member States, and the EU as a whole, anticipates missing their NECD 2010 emission ceilings for NO X . Of the three non-EU countries having emission ceilings for 2010 under the UNECE/CLRTAP Gothenburg protocol (Liechtenstein, Norway and Switzerland), both Liechtenstein and Norway reported NO X emissions in 2009 that were substantially higher than their respective 2010 ceilings.
Emissions of the main ground-level ozone precursor pollutants have decreased across the EEA-32 region between 1990 and 2009; nitrogen oxides (NO X ) by 41%, non-methane volatile organic compounds (NMVOCs) by 51%, carbon monoxide (CO) by 61%, and methane (CH 4 ) by 27%. This decrease has been achieved mainly as a result of the introduction of catalytic converters for vehicles. These changes have significantly reduced emissions of NO X and CO from the road transport sector, the main source of ozone precursor emissions. The EU-27 is still some way from meeting its 2010 target to reduce emissions of NO X , one of the two ozone precursors (NO X and NMVOC) for which emission limits exist under the EU’s National Emissions Ceiling Directive (NECD). Whilst total NMVOC emissions in the EU-27 were below the NECD limit in 2009, a number of individual Member States anticipate missing their ceilings for one or either of these two pollutants. Of the three non-EU countries having emission ceilings for 2010 set under the UNECE/CLRTAP Gothenburg protocol (Liechtenstein, Norway and Switzerland), all three countries reported NMVOC emissions in 2009 that were lower than their respective 2010 ceilings. However both Liechtenstein and Norway reported NO X emissions in 2009 that were substantially higher than their respective 2010 ceilings.
EEA-32 emissions of nitrogen oxides (NO X ) have decreased by 41% between 1990 and 2009. In 2009, the most significant sources of NO X emissions were the ‘Road transport’ sector (38%), ‘Energy production and distribution’ sector (22%), ‘Commercial, institutional and households’ sector (15%) and the ‘Energy use in industry’ sector (13%). The largest reduction of emissions in absolute terms since 1990 has occurred in the road transport sector. These reductions have been achieved despite the general increase in activity within this sector since the early 1990s and have primarily been achieved as a result of fitting three-way catalysts to petrol fuelled vehicles. However, ambient urban concentrations of NO 2 in EU-27 countries in recent years have not fallen by as much as reported emissions. Since 2002, NO 2 average annual mean concentrations at urban background sites have fallen by just 9 %, as indicated in CSI 004, during which time the reported NO X emissions for the EU-27 decreased by 23%. This discrepancy may be a result of a general under-estimation of the effect of catalytic degradation in newer cars, in which case a number of member states’ NO X emissions could be significantly higher than currently calculated. In the electricity/energy production sector reductions have also occurred, in these instances as a result of measures such as the introduction of combustion modification technologies (such as use of low NO X burners), implementation of flue-gas abatement techniques (e.g NO X scrubbers and selective (SCR) and non-selective (SNCR) catalytic reduction techniques) and fuel-switching from coal to gas. The National Emission Ceilings Directive (NECD) specifies NO X emission ceilings for Member States that must be met by 2010. In general, the newer EU Member States have made substantially better progress towards meeting their respective NO X ceilings than the older Member States of the EU-15. Ten of the twelve post-2004 Member States had already reduced their 2009 emissions beyond what is required under the NECD, with the remaining two reporting NO X emissions less than 2% above the NECD target . In contrast, only four of the EU-15 Member States reported emissions for 2009 within their respective national ceilings. Thus many Member States required a significant reduction of NO X emissions to have been made in 2010 if they are to meet their obligations under the NECD. Of the three non-EU countries having emission ceilings set under the UNECE/CLRTAP Gothenburg protocol (Liechtenstein, Norway and Switzerland) only for Switzerland were emissions in 2009 below the level of their 2010 ceiling. Environmental context: NO X contributes to acid deposition and eutrophication. The subsequent impacts of acid deposition can be significant, including adverse effects on aquatic ecosystems in rivers and lakes and damage to forests, crops and other vegetation. Eutrophication can lead to severe reductions in water quality with subsequent impacts including decreased biodiversity, changes in species composition and dominance, and toxicity effects. It is NO 2 that is associated with adverse affects on human health, as at high concentrations it can cause inflammation of the airways. NO 2 also contributes to the formation of secondary particulate aerosols and tropospheric ozone in the atmosphere - both are important air pollutants due to their adverse impacts on human health.
EEA-32 emissions of a number of compounds categorised as persistent organic pollutants (POPs), have decreased between 1990 and 2009 – e.g. hexachlorobenzene (HCB, by 92%), hexachlorocyclohexane (HCH, by 85%), polychlorinated biphenyls (PCBs, by 75%), dioxins & furans (by 83%), and poly-aromatic hydrocarbons (PAHs, by 61%). While the majority of countries report that POPs emissions have fallen during this period, a number do report that increased emissions have occurred. In 2009, the most significant sources of emissions for these POPs included the ‘Commercial, institutional and households’ (10% of HCB, 32% of dioxins and furans, 16% of PCBs) and ‘Industrial processes’ (70% of HCB, 32% of HCH, 27% of PCBs) sectors. Important emission sources of PAH, include residential combustion processes (open fires, coal and wood burning for heating purposes etc), industrial metal production processes, and the road transport sector. Emissions from these sources have all declined since 1990 as a result of decreased residential use of coal, improvements in abatement technologies for metal refining and smelting, and stricter regulations on emissions from the road transport sector. Environmental context: Persistent organic pollutants (POPs) are chemical substances that persist in the environment, have potential to bioaccumulate through the food web, and pose a risk of causing adverse effects to human health and the environment. This group of substances includes unintentional by-products of industrial processes (such as PAHs, dioxins and furans) pesticides (such as DDT), and industrial chemicals (such as polychlorinated biphenyls, PCBs). All share the property of being progressively accumulated higher up the food chain, such that chronic exposure of lower organisms to much lower concentrations can expose predatory organisms, including humans and wildlife, to potentially harmful concentrations. In humans they are also of concern for human health because of their toxicity, their potential to cause cancer and their ability to cause harmful effects at low concentrations. Their relative toxic/carcinogenic potencies are compound specific. POPs have also been shown to possess a number of toxicological properties. The major concern is often centred on their possible role in carcinogenic, immunological and reproductive effects but more recently concern has also been expressed over their possible harmful effects on human development.
EEA-32 emissions of non-methane volatile organic compounds (NMVOCs) have decreased by 51% since 1990. In 2009, the most significant sources of NMVOC emissions were ‘Solvent and product use’ (36%) (comprising activities such as paint application, dry-cleaning and other use of solvents), followed by ‘Commercial, institutional and households’ (15%). The decline in emissions since 1990 has primarily been due to reductions achieved in the road transport sector due to the introduction of vehicle catalytic converters and carbon canisters on petrol cars, for evaporative emission control driven by tighter vehicle emission standards, combined with limits on the maximum volatility of petrol that can be sold in EU Member States, as specified in fuel quality directives. The reductions in NMVOC emissions have been enhanced by the switching from petrol to diesel cars in some EU countries, and changes in the ‘Solvents and product use' sector (a result of the introduction of legislative measures limiting for example the use and emissions of solvents). The EU-27 Member States have, in general, made good progress towards reducing emissions in line with their obligations under the National Emission Ceilings Directive (NECD). Twenty four Member States (Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Estonia, Finland, France, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Sweden and the United Kingdom) have already reduced their national NMVOC emissions below the level of the emission ceilings set in the NECD. However, two Member States (Denmark and Germany) reported 2009 emissions significantly above their respective emission ceilings and therefore require significant reductions to have been made in 2010 in order to comply with the NECD. Emissions in 2009 for the three non-EU countries having emission ceilings set under the UNECE/CLRTAP Gothenburg protocol (Liechtenstein, Norway and Switzerland) were all well below their respective ceilings. Environmental context: Non-methane volatile organic compounds (NMVOCs) are a collection of organic compounds that differ widely in their chemical composition but display similar behaviour in the atmosphere. NMVOCs are emitted into the atmosphere from a large number of sources including combustion activities, solvent use and production processes. NMVOCs contribute to the formation of ground level (tropospheric) ozone, and certain NMVOC species such as benzene and 1,3 butadiene are hazardous to human health. Quantifying the emissions of total NMVOCs provides an indicator of the emissions of the most hazardous NMVOCs.
Across the EEA-32 countries, emissions of lead have decreased by 91%, mercury by 68% and cadmium by 70% between 1990 and 2009. For each substance, the most significant sources in 2009 are from energy-related sources associated with fuel combustion, particularly from public power and heat generating facilities, and from industrial facilities. Much progress has been made since the early 1990s in reducing point source emissions of cadmium and lead (e.g. emissions from industrial facilities). This has been achieved through improvements in for example abatement technologies for wastewater treatment, incinerators and in metal refining and smelting industries, and in some countries by the closure of older industrial facilities as a consequence of economic re-structuring. In the case of mercury, the observed decrease in emissions may be largely attributed to improved controls on mercury cells used in industrial processes (e.g. in the chlor-alkali process) including the replacement of old mercury cells by diaphragm or membrane cells, and the general decline of coal use across Europe as a result of fuel switching. The promotion of unleaded petrol within the EU and in other EEA member countries through a combination of fiscal and regulatory measures has been a particular success story. EU Member States have for example completely phased out the use of leaded petrol, a goal that was regulated by Directive 98/70/EC. From being the largest source of lead in 1990 when it contributed around 73% of total emissions, emissions from the road transport sector decreased since then by nearly 99%. Nevertheless, the road transport sector still remains an important source of lead, contributing around 10% of total lead emission in the EEA-32 region. However since 2002 little progress has been made in reducing emissions further; 98% of the total reduction from 1990 emissions of lead had been achieved by 2002. Environmental context: Heavy metals (such as cadmium, lead and mercury) are recognised as being toxic to biota. All have the quality of being progressively accumulated higher up the food chain, such that chronic exposure of lower organisms to much lower concentrations can expose predatory organisms, including humans, to potentially harmful concentrations. In humans they are also of direct concern because of their toxicity, their potential to cause cancer and their potential ability to cause harmful effects at low concentrations. The relative toxic/carcinogenic potencies of heavy metals are compound specific. Specifically, exposure to heavy metals has been linked with developmental retardation, various cancers and kidney damage. Metals are persistent throughout the environment, and cadmium, lead and mercury are among those heavy metals that are already a focus of international and EU action. These substances tend not just to be confined to a given geographical region, and thus are not always open to effective local control. For example, in the case of cadmium, much is found in fine particles which do not readily dry deposit, rather having long residence times in the atmosphere and hence are subject to long-range transport processes.
Total emissions of primary PM 10 particulate matter have reduced by 27% across the EEA-32 region between 1990 and 2009, driven by a 34% reduction in emissions of the fine particulate matter (PM 2.5 ) fraction; emissions of particulates between 2.5 and 10 µm have risen slightly (10%) over the same period. Of this reduction in PM 10 emissions, 37% has taken place in the 'Energy Production and Distribution' sector due reasons including the fuel-switching from coal to natural gas for electricity generation and improvements in the performance of pollution abatement equipment installed at industrial facilities.
EEA-32 emissions of NH 3 have declined by 26% between the years 1990 and 2009. Agriculture was responsible for 94% of NH 3 emissions in 2009. The reduction in emissions within the agricultural sector is primarily due to a reduction in livestock numbers (especially cattle) since 1990, changes in the handling and management of organic manures and from the decreased use of nitrogenous fertilisers. The reductions achieved in the agricultural sector have been marginally offset by the increased emissions which have occurred during this period in transport sectors and to a lesser extent the ‘Solvent and product use’ sector. In general, Member States have made excellent progress in reducing emissions below the level of their respective emission ceilings set in the National Emission Ceilings Directive (NECD). Preliminary data released by EEA in February 2011 show that 26 of the 27 EU Member States report that they have achieved their ceilings. Finland is the only Member State which has exceeded its 2010 ceiling. Three non-EU countries have emission ceilings set under the UNECE/CLRTAP Gothenburg protocol (i.e. Liechtenstein, Norway and Switzerland). The preliminary data recently received from these countries indicates only Liechtenstein has not met its 2010 emission ceiling. Environmental context: NH 3 contributes to acid deposition and eutrophication. The subsequent impacts of acid deposition can be significant, including adverse effects on aquatic ecosystems in rivers and lakes and damage to forests, crops and other vegetation. Eutrophication can lead to severe reductions in water quality with subsequent impacts including decreased biodiversity, changes in species composition and dominance, and toxicity effects. NH 3 also contributes to the formation of secondary particulate aerosols, an important air pollutant due to its adverse impacts on human health.
EEA-32 emissions of sulphur dioxide (SO 2 ) have decreased by 76% between 1990 and 2009. In 2009, the most significant sectoral source of SO X emissions was Energy production and distribution (70%), followed by emissions occurring from Energy use in industry (13%) and in the Commercial, institutional and households (9%) sector. The reduction in emissions since 1990 has been achieved as a result of a combination of measures, including fuel-switching in energy-related sectors away from high sulphur-containing solid and liquid fuels to low sulphur fuels such as natural gas, the fitting of flue gas desulphurisation abatement technology in industrial facilities and the impact of European Union directives relating to the sulphur content of certain liquid fuels. All of the EU-27 Member States have already reduced their national SO X emissions below the level of the 2010 emission ceilings set in the National Emission Ceilings Directive (NECD). Emissions in 2009 for the three non-EU countries having emission ceilings set under the UNECE/CLRTAP Gothenburg protocol (Liechtenstein, Norway and Switzerland) were also below the level of the respective 2010 ceilings. Environmental context: Sulphur dioxide is emitted when fuels containing sulphur are combusted. It is a pollutant which contributes to acid deposition which in turn can lead to potential changes occurring in soil and water quality. The subsequent impacts of acid deposition can be significant, including adverse effects on aquatic ecosystems in rivers and lakes and damage to forests, crops and other vegetation. SO X emissions also contribute as a secondary particulate pollutant to formation of particulate matter in the atmosphere, an important air pollutant in terms of its adverse impact on human health.
Between 1990 and 2008, EEA32 emissions of sulphur dioxide (SO 2 ) and nitrogen oxides (NOx) from public electricity and heat production fell despite a 35% increase in the amount of electricity and heat produced. Carbon dioxide (CO 2 ) emissions decreased by 4.3% from the 1990 baseline, primarily as a result of the economic downturn. SO 2 emissions fell by 70%, due mainly to abatement techniques, use of low-sulphur fuels, and fossil fuel switching. NOx emissions fell by 41%, primarily due to abatement techniques. Some emissions have risen in recent years due to increased utilisation of existing coal plant with higher emissions per unit of output.
The emissions and emissions intensity of carbon dioxide (CO 2 ), sulphur dioxide (SO 2 ) and nitrogen oxides (NO x ) from public conventional thermal power plants has decreased substantially since 1990, particularly in the case of SO 2 and NO x . This is primarily due to a decline in the use of coal, and replacement of old, inefficient coal plant as well as the use of abatement techniques. However, since 2000 a rise in the coal-fired electricity production has slowed the decline in emissions intensity. Rising overall electricity consumption has also acted to partly offset the environmental benefits from improvements in emissions intensity.
The data analysed from selected stations in major urban agglomerations indicate that during the period 1999-2008 mean values of NO 2 concentrations at road traffic stations remain relatively stable (trend is smaller than the statistical uncertainty on estimate). An increase is observed after 2003 in the maximum observed concentrations and although a slight reduction is observed in 2007, a further increase is noted in 2008. The background concentrations remain relatively stable throughout the period 1999-2008. For PM10, a slight increase was observed in 2003 in the maximum background concentrations, but these have followed a downward trend since. The trend in the maximum PM10 concentration at traffic stations varies during the period 2002-2008, with a downward trend observed between 2002-2004, an increase in 2006 and a downward trend thereafter. Throughout the period 2002-2007 mean traffic and mean background concentrations remain relatively stable, with a slight downward trend observed in recent years.
With the exception of NH 3 , transport related emissions of all main contributors to acidification and particulate and ozone formation (CO, CH 4 , NH 3 , NO x , NMVOCs, SO x and primary particulates (PM 10 and PM 2.5 )) decreased in the EEA-32 between 1990 and 2008. The maximum of transport related NH 3 emissions in the EEA-32 was reached in 2000. NH 3 contributes to both acidification and particulate formation.
Eutrophication The magnitude of the risk of ecosystem eutrophication and its geographical coverage has diminished only slightly over the years. The predictions for 2010 and 2020 indicate that the risk is still widespread over Europe. This is in conflict with the EU's long-term objective of not exceeding critical loads of airborne acidifying and eutrophying substances in sensitive ecosystem areas (National Emission Ceilings Directive, 6th Environmental Action Programme, Thematic Strategy on Air Pollution). Acidification The situation has considerably improved and it is predicted to improve further. The interim environmental objective for 2010 (National Emission Ceilings Directive) will most likely not be met completely. However, the European ecosystem areas where the critical load will be exceeded is predicted to have declined by more than 80 % in 2010 with 1990 as a base year. By 2020, it is expected that the risk of ecosystem acidification will only be an issue at some hot spots, in particular at the border area between the Netherlands and Germany. Ozone (O 3 ) Most vegetation and agricultural crops are exposed to ozone levels exceeding the long term objective given in the EU Air Quality Directive. A significant fraction is also exposed to levels above the 2010 target value defined in the Directive. Concentrations in 2007 were lower than in 2006. The effect-related accumulated concentrations, addressing exposure of crops to ozone over several summer months, shows large year-to-year variations, there is a non-significance tendency to increase.
Particulate Matter (PM 10 ) In the period 1997-2008, 18-50 % of the urban population was potentially exposed to ambient air concentrations of particulate matter (PM 10 ) in excess of the EU limit value set for the protection of human health (50 microgram /m 3 daily mean not be exceeded more than 35 days a calendar year); (Figure 1). Nitrogen dioxide (NO 2 ) In the period 1997-2008, 6-41 % of the urban population was potentially exposed to ambient air nitrogen dioxide (NO 2 ) concentrations above the EU limit value set for the protection of human health (40 microgram NO 2 /m 3 annual mean). There was a slight downwards trend over the period (Figure 1). Ozone (O 3 ) In the period 1997-2008, 13-62 % of the urban population in Europe was exposed to ambient ozone concentrations exceeding the EU target value set for the protection of human health (120 microgram O 3 /m 3 daily maximum 8-hourly average, not to be exceeded more than 25 times a calendar year by 2010). The 62 % of the urban population exposed to ambient ozone concentrations over the EU target value was recorded in 2003, which was the record year. There was no discernible trend over the period (Figure 1). Sulphur dioxide (SO 2 ) In the period 1997-2008, the fraction of the urban population in EEA-32 member countries that is potentially exposed to ambient air concentrations of sulphur dioxide in excess of the EU limit value set for the protection of human health (125 microgram SO 2 /m 3 daily mean not to be exceeded more than three days a year), decreased to less than 1 %, and as such the EU limit value set is close to being met everywhere in the urban background (Figure 1).
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