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Question

A lake with an inflow of domestic sewage rich in organic waste may result in:


A

Drying of the lake very soon due to algal bloom

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B

An increased production of fish due to a lot of nutrients

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C

Death of fish due to lack of oxygen

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D

Oxygen supply of lake increasing drastically

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Solution

The correct options are
A

Drying of the lake very soon due to algal bloom


C

Death of fish due to lack of oxygen


Eutrophication is the excessive richness of nutrients in a lake or other body of water, frequently due to run-off from the land, which causes a dense growth of plant life. One of the negative impacts of eutrophication and increased algal growth is a loss of available oxygen, known as anoxia. These anoxic conditions can kill fish and other aquatic organisms such as amphibians living in the water bodies.


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