First slide

Water Pollution and its Control

Question

The prime contaminants of water bodies that overstimulate the growth of algae are

Easy

A

nitrates and phosphates.
B

copper and cadmium.
C

DDT and mercury.
D

ammonia and arsenic.

Solution

Nitrates and phosphates are plant nutrients. Due to agricultural runoff, they are deposited in water bodies as contaminants. They overstimulate the growth of algae, causing unsightly scum and unpleasant odours, and robbing the water of dissolved oxygen vital to other aquatic life.

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