define eutrophication
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Organic substances are any substances which consist of carbon. Organic impurities may include the substances which pollute abiotic components like water, soil etc. Organic impurities which pollute water are collectively called as sewage. Sewage comprise human faeces, animal waste, urine, oil, vegetble peels, fruit wastes, some pesticides and some insecticides.
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a process by which pollution from such sources as sewage effluent or leachate from fertilized fields causes a lake, pond, or fen to become overrich in organic and mineral nutrients, so that algae and cyanobacteria grow rapidly and deplete the oxygen supply
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excessive richness of nutrients in a lake or other body of water, frequently due to run-off from the land, which causes a dense growth of plant life.
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Algae depleat the water of available oxygen which causes the death of fish.This is called eutrophication.............
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