Ground water
Water that moves down into the ground (due to gravity) passes between particles of soil, sand, gravel, or rock until it reaches a depth where the ground is filled, or saturated, with water.
Pollution
The presence in or introduction into the environment of a substance or thing that has harmful or poisonous effects.
Desalination
A process that takes away salt and mineral components from saltwater
Salt water
Water (as of the ocean) that naturally contains a significant amount of salt
Freshwater
Bogs, ponds, lakes, rivers, streams, and any other bodies of water bodies that consist of freshwater
Frozen freshwater
Freshwater that is not easily accessible due to being frozen in glaciers and ice caps. (Water locked up in ice and snow)