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23 September 2010
Dangerous dependence on virtual water deepens
The rate of global groundwater depletion has been on the rise, warning of a potential disaster for an increasingly globalized agricultural system says Marc Bierkens of Utrecht University in Utrecht, the Netherlands. In an upcoming study, Bierkens and his colleagues find that not only is global groundwater extraction outstripping its natural recharge rate, this disparity has been increasing. Groundwater represents about 30 percent of the available fresh water on the …