The earth contains 60% water and 40% land.  This shows how much water is present on earth, but there has to be a reason behind its so high quantity on earth.  The water is basically the life of the human being.  It is required every where, either it is plant irrigation, or human survival or simply making any vegetable or medicines the water is required every where.  Life without water is just impossible, not a single step can be taken without the water.  This is so huge and incomparable neces...