ARCHIVE: e-Digest Statistics about: Coastal and marine waters
- produced by human activities.
- the living weight of all organisms in an area or population.
- Heavy metals
- metals with a high atomic weight such as mercury, lead, cadmium, chromium and zinc. Heavy metals have widespread industrial use. They are poisonous and tend to persist in living organisms once consumed and can accumulate in selective organs such as the brain liver and kidneys.
- polychlorinated biphenyls. Widely used compounds containing chlorine. PCBs can accumulate in food chains and are thought likely to produce harmful side-effects, particularly during the reproductive cycle of plants and animals. Many PCBs are non-biodegradable.
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Page last modified: 16 September 2003
Page published: 10 September 2003