Pollution

THERMAL POLLUTION – addition of heat to a cool environment
cause
Water or air used as cooling fluids in power plants and manufacturing that becomes heated
issues
Heated cooling water from power plants may be 15°C hotter than lake or stream water;
Heated water increases metabolic rates in fishes;
Adding heated water to a water body reduces the amount of dissolved oxygen that the water may hold.
Pollution control
Any of a variety of means employed to limit damage done to the environment by the discharge of harmful substances and energies.

Pollution control might include refuse disposal systems such as sanitary landfills, emission control systems for automobiles, sedimentation tanks in sewerage systems, the electrostatic precipitation of impurities from industrial gas or the practice of recycling.

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