| A | B |
| Watershed | The entire area of land that is drained by a river |
| Groundwater | water that seeps down and is stored underground |
| Aquifers | large amounts of ground water may be stored in underground rock formations |
| Recharge Zone | The area of land from which the groundwater originates |
| Desalinization | Removing salt from salt water. |
| Water Pollution | the introduction of chemical, physical, or biological material into water that degrades the quality of the water and affects the organisms that drink it and live in it . |
| Point Pollution | pollution that is discharged from a single source such as a factory, a wastewater treatment plant or an oil tanker. |
| NonPoint Pollution | pollution that comes from many sources rather than from a single specific site. |
| bioaccumulation | accumulation of larger and larger amounts of a toxin within the tissue of organisms at each successive trophic level |
| thermal pollution | when power plants and other industries located along lakes and rivers use the water in there cooling system |
| artificial eutrophication | introduction of inorganic plant nutrients into a body of water through sewage and fertilizer runoff |
| algal blooms | algae that form large mats |
| territorial sea | the coastal nation extends to 22 km from its coastline |