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UN Water; UN Water (Editor) (2013): Water Scarcity Factsheet. United Nations Water. URL [Accessed: 09.04.2013].

Thematic Factsheet on Water Scarcity. The world contains an estimated 1 400 million cubic km of water. Only 0.003% of this vast amount, about 45 000 cubic km, are what is called "fresh water resources", i.e. water that can be used for drinking, hygiene, agriculture and industry.