Overall change in emissions of acidifying substances by country, 1990-2006

Figure expired Created 24 Mar 2009 Published 24 Mar 2009 Last modified 26 Aug 2017
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The graph shows the emissions of acidifying pollutants (SO2, NOx and NH3) each weighted by an acid equivalency factor prior to aggregation to represent their respective acidification potentials

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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.

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