The first is air. A person can live approximately four minutes without air and four days without water. Greek philosophers say that water is one of four elements that make up the earth. Actually water covers two-thirds of the earth. Although there is such a small obtainable quantity of water on earth, the issue here in Ontario is usually quality not quantity.
Water is undervalued.
Let us keep in mind that we are not the only ones who depend on water. Water is also important for the preservation of wildlife. Besides consumption many species depend on water for their habitat. This is not only why water is important but also why we should monitor it. Monitoring the environment helps us understand.