When sewage is added to water bodies,fish die | vedclass

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Question

(D) When sewage is discharged into water bodies,it contains high levels of organic matter. Microorganisms like bacteria decompose this organic matter,

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It leads to a depletion of dissolved oxygen in the water.

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(D) When sewage is discharged into water bodies,it contains high levels of organic matter. Microorganisms like bacteria decompose this organic matter,a process that requires a significant amount of oxygen. This leads to a sharp decrease in the $BOD$ (Biochemical Oxygen Demand) and a corresponding depletion of dissolved oxygen in the water. As a result,aquatic organisms like fish,which rely on dissolved oxygen for respiration,die due to suffocation.

When sewage is added to water bodies,fish die because:

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$(a)$ Discuss the major programs that the Ministry of Environment and Forests,Government of India,has initiated for saving major Indian rivers from pollution.
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