Question

Thermal pollution of water bodies is due to __

1. Wastes from mines

2. Agricultural run off

3. Discharge of excess heat from power plants and factories

4. Hydroelectric power plants

Answer 1

Dear student,
The answer is 3.Thermal pollution of water bodies is due to the discharge of excess heat from power plants and factories.The water which is used as a coolant to coll down the machinery in industries is returned or released into the water at high temperature.This sudden change in the water temperature affects the water bodies and aquatic animals causing thermal pollution of water bodies.
Regards