A river with an inflow of domestic sewage ric | vedclass

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(B) : High amount of organic waste in a river will trigger and activate decomposer microbes which will decompose the organic waste.Biochemical Oxygen

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death of fish due to lack of oxygen

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(B) : High amount of organic waste in a river will trigger and activate decomposer microbes which will decompose the organic waste.Biochemical Oxygen Demand $(BOD)$ of this river will shoot up,and decomposers will utilize most of the dissolved oxygen present in the water.Consequently,the level of dissolved oxygen will decrease to an alarming extent.Aquatic animals like fish,which depend on the oxygen dissolved in water,will ultimately die due to suffocation.

$A$ river with an inflow of domestic sewage rich in organic waste may result in

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