Chapter Diagnosis
Therapy
2.4
There is a trend in the deep water
If this trend is mainly caused by
of the Baltic Sea toward anoxic
natural clima and sea level changes,
conditions.
nothing can be done. If it is caused
to a reasonable extent by manmade eutrophication, this could be
stopped.
2.5
The surface waters of the warm
In principle, every amount of domesoceans are mostly poor in plant
tic sewage could be introduced into
nutrients, i.e., phosphorus and
the open ocean without adverse
nitrogen.
effects. Whether this is practicable,
economic considerations could tell.
2.6
When either biologically treated or
Further scientific research is necesuntreated sewage is introduced
sary to affirm this statement.
into the water of an open ocean
coast with good oxygen renewal,
the effect upon the system is about
equally unproblematic.
2.7
Detergents are toxic.
Detergents with less toxicity can be
developed.
2.8
While in temperate zones a 2°C rise
Before well-founded conclusions
of temperature in estuarine and
can be drawn, more case studies on
coastal waters seems tolerable,
thermal pollution should be puborganisms in tropical zones live very lished.
close to their temperature limit;
they cannot stand a rise in water
temperature.
2.9
In the vicinity of coastal cities,
More research is necessary to clarify
in estuaries and around pollution
whether this is the effect of one
sources, the natural flora and fauna
dominating pollution factor, or is
living at the shore undergo changes, the result of several stress factors
sensitive species are replaced by
acting together. Marine conservation
resistant ones.
parks should be established, before
the rapidly proceeding utilization
of coastal resources all over the
world has destroyed suitable areas.
3
Elevated concentrations of mercury Mercury effluents from industry are
in fish and other seafood are deadly forbidden. More research is necesfor human consumption.
sary to evaluate the effect of small
traces of mercury in sewage upon
the marine system.
192
Therapy
2.4
There is a trend in the deep water
If this trend is mainly caused by
of the Baltic Sea toward anoxic
natural clima and sea level changes,
conditions.
nothing can be done. If it is caused
to a reasonable extent by manmade eutrophication, this could be
stopped.
2.5
The surface waters of the warm
In principle, every amount of domesoceans are mostly poor in plant
tic sewage could be introduced into
nutrients, i.e., phosphorus and
the open ocean without adverse
nitrogen.
effects. Whether this is practicable,
economic considerations could tell.
2.6
When either biologically treated or
Further scientific research is necesuntreated sewage is introduced
sary to affirm this statement.
into the water of an open ocean
coast with good oxygen renewal,
the effect upon the system is about
equally unproblematic.
2.7
Detergents are toxic.
Detergents with less toxicity can be
developed.
2.8
While in temperate zones a 2°C rise
Before well-founded conclusions
of temperature in estuarine and
can be drawn, more case studies on
coastal waters seems tolerable,
thermal pollution should be puborganisms in tropical zones live very lished.
close to their temperature limit;
they cannot stand a rise in water
temperature.
2.9
In the vicinity of coastal cities,
More research is necessary to clarify
in estuaries and around pollution
whether this is the effect of one
sources, the natural flora and fauna
dominating pollution factor, or is
living at the shore undergo changes, the result of several stress factors
sensitive species are replaced by
acting together. Marine conservation
resistant ones.
parks should be established, before
the rapidly proceeding utilization
of coastal resources all over the
world has destroyed suitable areas.
3
Elevated concentrations of mercury Mercury effluents from industry are
in fish and other seafood are deadly forbidden. More research is necesfor human consumption.
sary to evaluate the effect of small
traces of mercury in sewage upon
the marine system.
192