Pumps solubility behavior

This behavior can lead to an environmental problem known as thermal pollution. During many industrial processes, large amounts of water are taken from a nearby river or lake, pumped through the system to cool liquids, gases, and equipment, and then returned to the body of water at a higher temperature. The metabolic rates of fish and other aquatic animals increase in the warmer water released near the plant outlet thus, their need for O2 increases, but the concentration of dissolved O2 is lower at the higher temperature. Farther from the plant, the water temperature returns to ambient levels and the O2 solubility increases. One way to lessen the problem is with cooling towers, which lower the water s temperature before it exits the plant. 

---