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Answer to: what causes a dead zone in the ocean
excessive nutrient pollution from human activities coupled with other factors that deplete the oxygen
Dead zones are hypoxic ( low – oxygen ) areas in the world ‘s oceans and large lakes , caused by “ excessive nutrient pollution from human activities coupled with other factors that deplete the oxygen required to support most marine life in bottom and near – bottom water . ( NOAA ) ” . In the 1970s oceanographers began noting increased instances of dead zones . These occur near inhabited coastlines , where aquatic life is most concentrated . ( The vast middle portions of the oceans , which naturally have little life , are not considered “ dead zones ” . )
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what causes a dead zone in the ocean
excessive nutrient pollution from human activities coupled with other factors that deplete the oxygen