Figure

Changes (%) in emissions of acidifying pollutants by source category, 1990-2007, EEA-27 (weighted by acid equivalency factors)

Figure Created 19 Aug 2010 Published 12 Jan 2011 Last modified 29 Nov 2012

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The figure shows the emissions of acidifying pollutants (sulphur dioxide SO2, nitrogen oxides NOx and ammonia NH3) each weighted by an acid equivalency factor prior to aggregation to represent their respective acidification potentials. The acid equivalency factors are given by: w(SO2) = 2/64 acid eq/g = 31.25 acid eq/kg, w(NOx) = 1/46 acid eq/g = 21.74 acid eq/kg and w(NH3) = 1/17 acid eq/g = 58.82 acid eq/kg.