The earth is made up of approximately 70 percent water, just like the human body, but 97 percent of that water is salt water, and another 2 percent is frozen in glaciers and ice caps, while less than 1 percent of all the water in the world is potable (fresh/drinking).

The water we have today is the same water we've always had on earth; it is recycled over and over by evaporation, thence rising into clouds upon cooling, thereby condensing and falling back to earth by precipitation in the form of snow and rain