Emissions of acidifying substances

Indicator Fact Sheet
Prod-ID: IND-5-en
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Assessment made on  01 Jan 2001

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Policy issue:  Are we reaching emission targets for acidifying substances?

Figures

Change in total acidifying substance emissions since 1990 compared with the 2010 targets, EU15 Change in total acidifying substance emissions since 1990 compared with the 2010 targets, EU15 The targets for 2010 are the Gothenburg Protocol target (December 1999) and the more recent NECD Common Position targets (June 2000) for the EU and countries for sulphur dioxide, nitrogen dioxide and ammonia
Emission of acidifying gasses, EU 15 Emission of acidifying gasses, EU 15 The targets for 2010 are the Gothenburg Protocol target (December 1999) and the more recent National Emission Ceilings Directive (NECD) Common Position targets (June 2000) for sulphur dioxide, nitrogen oxide and ammonia

Key assessment

The effects of sulphur dioxide, nitrogen dioxide and ammonia emissions - acid rain, eutrophication and damaged forests, rivers, seas and land - were one of the first major environmental problems on a European scale taken seriously by society at large.

New regulations obliged power station operators to install desulphurisation systems in their plants, while economic factors saw many switch from coal and heavy oil towards natural gas, which by its very nature produces less acidifying gases (see Energy). The 1990s also saw major economic restructuring in the new German Lander. As a result, emissions in sulphur dioxide fell by 70%.

'Cleaner exhaust' systems were also introduced into motor vehicles, reducing the average emission of nitrogen oxides per vehicle. This, however, was offset by increasing road traffic, so the EU missed its 5th Environmental Action Programme target of reducing nitrogen oxides emissions to 30% below those in 1990 by 2000.

Ammonia emissions, finally, are stabilizing, although the data on the contribution of the agricultural sector - the largest source of ammonia emissions (see Agriculture: Nutrient surplus) - are uncertain, with emissions from this sector difficult to control.

When the acidifiying potential of each substance is calculated, the overall sum shows a 32% drop over the 1990-1998 period. While this progress is welcome, however, further reductions are required to reach the target set.

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