Emissions of the main ground-level ozone precursor pollutants have decreased across the EEA-33 region between 1990 and 2011; nitrogen oxides (NO X ) by 44%, non-methane volatile organic compounds (NMVOC) by 57%, carbon monoxide (CO) by 61%, and methane (CH 4 ) by 29%.
This decrease has been achieved mainly as a result of the introduction of catalytic converters for vehicles, which has significantly reduced emissions of NO X and CO from the road transport sector, the main source of ozone precursor emissions.
The EU-28 as a whole reported 2011 emissions at 4% below the 2010 NECD ceiling for NO X , one of the two ozone precursors (NO X and NMVOC) for which emission limits exist under the EU's NEC Directive (NECD). Total NMVOC emissions in the EU-28 were 22% below the 2010 NECD limit in 2011, however, seven of individual Member States did not meet their ceilings for one or both 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 reported NMVOC emissions in 2011 that were lower than their respective ceilings, however Liechtenstein and Norway reported 2011 NO X emissions higher than their ceiling for 2010.
Data and maps
Emissions of ozone precursors
Absolute decoupling of manufacturing industries ´nutrient emissions from the GVA is observed in 9 countries (Austria, Czech Republic, Germany, Greece, Ireland, Hungary, Netherland, Spain and Portugal). Decrease in emission coupled with decrease in GVA occurred in United Kingdom, France, Italy and Sweden. However in all cases the rate of emission decrease was greater than the one of GVA. Increase of nutrient emission despite drop in gross value added was observed in Belgium.
The developments arise from different absolute levels of emission intensities and depend on no major changes in the data coverage during the period within the countries, such as including more facilities in the latest year reporting despite already existing in earliest year. It should be noted that as some industrial emissions may vary considerable from year to year, the comparison of two selected years, only, may be subject to variations not being representative for a consistent trend.
Absolute decoupling of manufacturing industries ´heavy metals emissions from the GVA is observed again in 10 countries (Czech Republic, Germany, Greece, Hungary, Netherland, Poland, Slovenia, Slovakia, Spain and Portugal). Decrease in emission coupled with decrease in GVA occurred in United Kingdom, France, Italy, Belgium and Sweden. In all cases the rate of emission decrease was greater than the one of GVA. Increase of emission despite drop in GVA was observed in Finland.
Given the multiple factors that affect both sectoral GVA and the pollution pressure originating from manufacturing, it is complicated to draw direct relationships between these two variables. Some key descriptors which could aid in explaining the behaviour of these are the structure of the sector (e.g., facility size distribution, production technology, relative proportion reported as E-PRTR releases) , the socioeconomic characteristics (e.g. salary levels) of the area and the policy measures in place (e.g., treatment requirements). However, it must be noted that the specific context of each country could result in varying combinations of the mentioned factors and their aggregate effects.
Data and maps
Emission intensity of manufacturing industries in Europe