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Calculation of the import/export balance of sulphur and nitrogen
shows that import of pollutants is characteristic for Latvia. The
import of sulphur and nitrogen from European countries exceeds the
emissions from Latvia.
Observations on the transboundary air pollution were begun in
the south-western part of Latvia at Rucava in 1988, and in the
north-eastern part at Zosçni in 1994.
The total deposition of nitrogen and sulphur at Zosçni is
slightly higher than at Rucava, but at both locations, the
deposition has decreased since 1995 by about two times.
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