Question

A laundry engaged in washing clothes has been pouring waste water directly into the river. Over a period of time, it was found that large numbers of fish were dying in the river. Answer the following questions based on the above information: (๐ข) Mention the reasons for the dying of fish. (๐ข๐ข) Is there any way it can be avoided? (๐ข๐ข๐ข) Mention values associated with above situation.

  • Natural resources CBSE Class 9
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Answer

(i) The chemical detergents in the waste water accumulate in the body of fish. The process is called biological magnification. These accumulated chemicals interrupt the metabolic processes and ultimately results in death.

(ii) The situation can be avoided by not discharging the waste water directly into the river or by treating the waste water before its discharge.

(iii) Environmental conservation.

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