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Pollution of the North Sea - An Assessment (Paperback, Softcover reprint of the original 1st ed. 1988)
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Discovery Miles 29 340
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Pollution of the North Sea - An Assessment (Paperback, Softcover reprint of the original 1st ed. 1988)
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This preface is being written at a time of exceptional public
interest in the North Sea, following media head lines on toxic
algal blooms, the mass mortality of common seals, and concern over
pollution levels. These headlines may suggest that pollution of the
North Sea is a recent event. This is not the case. Although no data
are available (methods simply did not exist), it is safe to assume
that emission (both into air and water) of heavy metals already
started to increase in the 19th cen tury. The growth of cities and
introduction of sewer sys tems led to the discharge of raw sewage
and sewage sludge. The introduction of man-made (xenobiotic) organ
ic chemicals and their subsequent emission into the North Sea
commenced before the second world war. The shallower and coastal
areas of the North Sea receive the highest concentrations of these
pollutants. Not unexpectedly, these areas - some Norwegian fjords,
the Dutch coast, the German Bight - show signs of ecosystem
deterioration and eutrophication. A certain percentage of the
pollutants does not remain in the North Sea but is "exported" to
the Atlantic. The North Sea therefore con tributes to the global
input of pollutants to the world's oceans. The major part of the
pollutants accumulate in the North Sea and are incorporated in the
bottom sediments. Although they are "out of sight," they should not
be "out of mind.""
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