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: a. Mention the reasons for the dying of fish
b. Is there any way it can be avoided?
c. Mention values associated with above information.

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Solution

a. The soaps and detergents used in laundry contain phosphates which enhance the growth of algae in the water bodies which then compete for oxygen with other aquatic animals and ultimately lead to death. Hence boring laundry waste in water bodies leads to eutrophication.
b. This can be avoided by proper planning and using of phosphate-free detergents. the wastewater needs to be properly treated before releasing it off in the water bodies.
c. Awareness, scientific reasoning, concern for the environment, etc.

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