14 Feb '12, 5pm

Reliance on ‘virtual water’ puts some nations at risk, study says #water

14 Feb 2012: ‘Virtual Water’ Reliance Puts Nations at Risk, Study Says A new study calculates that about one-fifth of all water goes toward the production of crops and commodities for export , part of a global phenomenon known as “virtual water” that researchers say Click to enlarge Arjen Hoekstra and Mesfin Mekonnen, PNAS The virtual water balance, per country could place pressure on finite water supplies in some nations. Using worldwide trade indicators, demographic data, and statistics on water use, researchers from the University of Twente in the Netherlands mapped the world’s water footprint, including patterns of trade they say are creating disparities in water use. According to the study, published in the journal Proceedings of the National Academy of Sciences , many desert and island nations are becoming increasingly dependent on water from other countries, as they...

Full article: http://e360.yale.edu/digest/reliance_on_virtual_water_put...

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