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Revision as of 18:04, 28 July 2017
Four billion people facing severe water scarcity
Mesfin M. Mekonnen and Arjen Y. Hoekstra
Science Advances 12 Feb 2016: / Vol. 2, no. 2, e1500323 / DOI: 10.1126/sciadv.1500323
http://advances.sciencemag.org/content/2/2/e1500323
Abstract: Freshwater scarcity is increasingly perceived as a global systemic risk. Previous global water scarcity assessments, measuring water scarcity annually, have underestimated experienced water scarcity by failing to capture the seasonal fluctuations in water consumption and availability. We assess blue water scarcity globally at a high spatial resolution on a monthly basis. We find that two-thirds of the global population (4.0 billion people) live under conditions of severe water scarcity at least 1 month of the year. Nearly half of those people live in India and China. Half a billion people in the world face severe water scarcity all year round. Putting caps to water consumption by river basin, increasing water-use efficiencies, and better sharing of the limited freshwater resources will be key in reducing the threat posed by water scarcity on biodiversity and human welfare...
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