|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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