Water pollution. Water pollution or aquatic pollution



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Water pollution.

Thermal pollution

The Brayton Point Power Station in Massachusetts discharges heated water to Mount Hope Bay.
This section is an excerpt from Thermal pollution.[edit]
Thermal pollution, sometimes called "thermal enrichment," is the degradation of water quality by any process that changes ambient water temperature. Thermal pollution is the rise or fall in the temperature of a natural body of water caused by human influence. Thermal pollution, unlike chemical pollution, results in a change in the physical properties of water. A common cause of thermal pollution is the use of water as a coolant by power plants and industrial manufacturers. Urban runoff—stormwater discharged to surface waters from rooftops, roads and parking lots—and reservoirs can also be a source of thermal pollution.[34] Thermal pollution can also be caused by the release of very cold water from the base of reservoirs into warmer rivers.
Elevated water temperatures decrease oxygen levels (due to lower levels of dissolved oxygen, as gases are less soluble in warmer liquids), which can kill fish (which may then rot) and alter food chain composition, reduce species biodiversity, and foster invasion by new thermophilic species.[35]: 179 [10]: 375 

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