assessment1

Emissions of energy-related ozone precursors (CH4, CO, NMVOC, NOX) have decreased by 45 % between 1990 and 2005 in the EU-27. The largest reductions in emissions occurred in the transport sector (-50 %), largely as a result of the continued introduction of catalytic converters in new vehicles during this period. However, energy production and use remains a significant source of emission for all these precursor pollutants. Reducing energy-related emissions of ozone precursors therefore remains a key priority for reducing local and transboundary air pollution and in ensuring that countries meet their respective emissions ceiling targets of the National Emissions Ceilings Directive (NECD) and the UNECE Gothenburg Protocol.