Multiple choice

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

  1. drying of the lake very soon due to algal bloom

  2. an increased production of fish due to lot of nutrients

  3. death of fish due to lack of oxygen.

  4. increased population of aquatic food web organisation.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sewage rich in organic waste promotes the growth of microorganisms that consume dissolved oxygen, leading to a decrease in oxygen levels and the subsequent death of fish.

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