| Which of the following is/are causes of thermal pollution? |
| 1. Use of water as coolant. |
| 2. Storm water by power plants. |
| 3. Silting effect in the rivers. |
| Select the correct answer using the codes given below. |
A) Only 1
B) 1 and 2
C) 1 and 3
D) All of these
Correct Answer: B
Solution :
[b] Thermal pollution is the degradation of water quality by any process that changes ambient water temperature. A common cause of thermal pollution is the use of water as a coolant, storm water by power plants and industrial manufacturers. When water used as a coolant is returned to the natural environment at a higher temperature, the change in temperature decreases oxygen supply and effects ecosystem composition.
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