Water is one of the important substance on the earth . all plants , animal , and humans must have water to survive . if there would be no water then there would be no life too.apart from drinking ,people have many other uses of the water such as cooking, washing,keeping houses clean , keeping plants alive . water is also essential for the healthy growth of farms crops and it is also used in the manufacture of many products .it is the most important that the water which people drink and use of other pruposes is clean water . this means that water must be free of germs and chemicals and clear.
with two thirds of earth`s surface is covered by water and the human body consisting of 75 percent of it .if there would be no water no earth then no can survive beacuse all the functions of our body are dependent on water such as digestion, assimilation, elimination, respiration, maintaining temperature (homeostasis) integrity and the strength of all bodily structures.Your body, being primarily water, requires sufficient daily water replacement in order to function efficiently.