First slide

Water Pollution and its Control

Question

What is the most likely result of increase in nitrates in a water body?

Easy

A

Increase in fish population
B

Increase in dissolved oxygen
C

Decrease in temperature
D

Increase in plant growth

Solution

Presence of large amounts of nutrients like nitrates in waters causes excessive growth of planktonic (free-floating) algae, called an algal bloom (increase in plant growth). Algal bloom imparts a distinct colour to the water bodies. They cause deterioration of the water quality and fish mortality. Some bloom-forming algae are extremely toxic to human beings and animals.

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