Nearly one-sixth of the population of China and India are fed using amounts of water that can’t be sustained. Some nations have even resorted to importing grain and soybeans rather than grow it themselves to save water. But this stopgap approach can’t help hold off inevitable shortages: According to the International Water Management Institute, future farmers will need 17% more water than the world now has available. Just as nations compete for oil, China’s move into foreign farms suggests competition for water isn’t far off, either.

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Source: http://blogs.usatoday.com/oped/2008/05/todays-food