Chapter Diagnosis
Therapy
8.6
Likewise, distant from local pOints
Nothing to be done.
man has not altered cadmium
concentrations in the marine
environment. There is a possible
health risk only from molluscs,
but not from fish.
8.7
The quantity of lead mined in the
More scientific results on long-term
lead mines of the world per year
trends of marine lead contaminais about equal to the total lead
tion are necessary. Lead in car
dissolved in ocean water. In principle gasoline should be forbidden.
man could have changed the lead
concentrations in the water of the
world's oceans.
9
Mostly via the atmosphere, many
It seems that due to prohibitive
chlorinated hydrocarbons, among
measures concentrations are already
them toxic pesticides, have been
decreasing. Better scientific moniintroduced into the oceans and can
toring of trends on a world-wide
be analyzed in marine organisms
scale is necessary, and more research
including seafish and other seafood. on the fate and effects of such
Fortunately concentrations are
pollutants. It ought to be confirmed
lower than in meat from cattle.
that with analytical techniques
High concentrations are present in
presently used only a small fraction
marine birds and mammals.
of the total variety of chlorinated
There is evidence that present day
organics has been identified.
PCB concentration in Baltic seaAtmospheric pollution by toxic
water causes reduced reproductive
and persistent organics must be
success in fish and seal.
reduced.
10
An impressive series of environmen- Obviously, through this legislation,
tal laws on international and
impact of pollution upon the
national level has been issued.
marine environment has decreased,
and this trend should continue.
195