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

Figure Created 24 Mar 2009 Published 24 Mar 2009 Last modified 29 Nov 2012, 11:35 AM
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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

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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).

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