Freshwater lakes and swamps account for a mere 0.29% of the Earth's freshwater. 20% of all freshwater is in one lake, Lake Baikal in Asia. Another 20% is stored in the Great Lakes, Huron, Michigan, and Superior. Rivers hold only about 0.006% of total freshwater reserves. Mankind essentially uses only a drop in the bucket of the total available water supply.
So where is all the water? Antarctica, which is thought to hold about 75% of the world's fresh water (and 90% of the world's ice). In fact, almost 10 percent of the world's land mass is currently covered with glaciers, mostly in Antarctica and Greenland.
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