| A | B |
|---|
| Aquifer | An underground rock formation that contains water. |
| Artificial Eutrophication | Entrophication that occurs because of the introduction of inorganic plant nutrients into a body of water through sewage and fertilizer runoff. |
| Biological Magnification | Accumulation of increasingly large amounts of a toxin within the tissues of organisms at each successive trophic level. |
| Desalinization | Process in which salt is removed from salt water, as from the oceans, rendering the water fit for drinking and cooking. |
| Groundwater | Water that seeps down through the soil and is stored underground. |
| Nonpoint Pollution | Pollution that comes from many sources rather than from a single specific site; an example is pollution that reaches a body of water from streets and storm sewers. |
| Recharge Zone | Area of land on the Earth's surface from which groundwater originates. |
| Surface Water | Fresh water found above ground in lakes, ponds, rivers, and streams. |
| Thermal Pollution | Addition of excessive amounts of heat to a body of water, such as in runoff from industrial cooling systems. |
| Point Pollution | Pollution discharged from a single source, such as from a factory or wastewater treatment plant. |
| Water Pollution | Introduction of foreign substances into water that degrade its quality, limit its use, and affect organisms living in it or drinking it. |
| Watershed | Entire area of land that is drained by a river. |
