Water is a non-renewable resource.
It cycles through our system in the forms of clouds, precipitation, ground water, streams and rivers, oceans, plants and animals. A single drop of water in a water bottle today may have been a drop drunk by dinosaurs, it might have been part of the glaciers at one time, and it could have been in the ocean when Columbus crossed it. Conserving and protecting our water from pollution is vital to us as well as to the environment. Once in the water cycle, pollution can often travel, affecting the entire system. For example pollution can be picked up by rain and carried to a hillside.