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प्रश्न
Write the effect on the characteristics of a river when urban sewage is discharged into it.
अति संक्षिप्त उत्तर
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उत्तर
A precipitous drop of dissolved oxygen (DO) downstream from the sewage disposal location. Fish and other aquatic life die as a result, clean water organisms vanish, and algae blooms grow excessively.
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