<P> Water is distributed across earth . Most water in the Earth's atmosphere and crust comes from the world ocean's saline seawater, while freshwater accounts for only 2.5% of the total . Because the oceans that cover roughly 70% of the area of the Earth reflect blue light, the Earth appears blue from space, and is often referred to as the blue planet and the Pale Blue Dot . An estimated 1.5 to 11 times the amount of water in the oceans may be found hundreds of miles deep within the Earth's interior, although not in liquid form . </P> <P> The oceanic crust is young, thin and dense, with none of the rocks within it dating from any older than the breakup of Pangaea . Because water is much denser than any gas, this means that water will flow into the "depressions" formed as a result of the high density of oceanic crust . (On a planet like Venus, with no water, the depressions appear to form a vast plain above which rise plateaux). Since the low density rocks of the continental crust contain large quantities of easily eroded salts of the alkali and alkaline earth metals, salt has, over billions of years, accumulated in the oceans as a result of evaporation returning the fresh water to land as rain and snow . </P>

What is the most abundant water available on earth based on total global water