Our living on earth depends on an ecological balance together with an atmosphere balance. This balance is placing our survival at risk. One of the causes of this is the interaction between land and water, where water falls from the atmosphere, flows through air, drops in the soil, runs through it, makes puddles, vaporizes with the sun and gets back to the atmosphere. During all this process, it carries nutrients and chemicals that are filtered through the soil.
Water is a clear, colorless, odorless liquid, the most common substance on the earth's surface.
This transparent liquid is vital for every living thing on our planet. The Great Lakes of North America comprise the largest surface fresh water system in the world. Water is described as polluted if the amount of, or kinds of, substances contained in it are likely to cause harm to humans, animals, or plants. Even by becoming too rich in nourishment, water can also be polluted. Environmental pollution is any discharge of material into water, or land, or air, that causes a change on the ecological balance that lowers the quality of life.