How is change in temperature of water considered as form of water pollution?Please answer urgently.

Please find below the solution to the asked query

The change in ambient temperature of water body is called thermal pollution. It results in the degradation of quality of water by changing its temperature and making it unfavourable. The increased temperature reduces the level of dissolved oxygen in water which may kill aquatic organisms. On the other hand, the reduction in temperature may also kill aquatic organisms as they may fail to withstand low temperature. 
Hence, we can say, as change in temperature affects the quality of water, so it is a form of water pollution.
        
Hope this information will clear your doubts about the topic.
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Abrupt rise or fall of temperature may change the physical properties of the water body. If temperature of a water body rises, the level of dissolved oxygen decreases which may kill aquatic organisms. Also if extremely cold water from the base of reservoirs gets mixed with normal water bodies, aquatic organisms may fail to withstand the temperature difference and die. HOPE THIS HELP
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rise or fall of temperature may change the physical properties of the water body.
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i don,t know
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