Water is a most important source needed for all living in this world. One of the most famous poets, Thiruvalluvar, quotes βThe world does not act without water.β Yes, that is 100% true, each and every living thing on this earth depends on water including human beings. Water is a combination of the chemical substance hydrogen(H) and oxygen(O). In the chemical term water is simply mentioned as H2O. People should know about the importances and health benefits of drinking water in their daily life.