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

Figure Created 19 Aug 2010 Published 14 Jan 2011 Last modified 29 Nov 2012
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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).


European data


European Environment Agency (EEA)
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