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Environmental Issues

Question

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A factory drains its waste water into the nearby lake causing algal bloom.
(a) How was the algal bloom caused ?

(b) What would be the consequences ?

(c) Give the term for the cause of it.

Solution

(a) Algal bloom is caused due to enrichment of water with nutrients such as nitrogen and phosphorus. As the fertility increases plant life increases.

(b) Water becomes unfit for aquatic fauna because of less oxygen, scum and unpleasant odour.

(c) Eutrophication.

Some More Questions From Environmental Issues Chapter

The meaning of BOD is :

Which of the following pollutants is not produced by exhaust of motor vehicles ?

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Which of the atmospheric layer contains ozone layer ?

The amount of dissolved oxygen required by the microorganisms to degrade the organic wastes present in water is called ?

The cause of acid rain is :

Which one of the following causes ozone depletion ?

What disease is caused due to consumption of fishes captured from water contaminated with mercury ?

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