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The simple answer,to paraphrase Samuel Taylor Coleridge, is "Water, water everywhereand not a drop to drink." ("Rime of the Ancient Mariner." 1797–1798.)The complex explanation is that despite the fact that over 70%of our planet is covered with water, the resource is not necessarilylocated where it can be economically used, and some of whatis accessible is contaminated, in dispute, and not appropriatefor the intended use.
We require water for agriculture, drinking, hygiene, manufacturing,and sanitation. United Nations data suggest that over one billionpeople (1 of 6) have no access or very limited access . . . [Full Text]