A recent a study by the International Water Management Institute and the UN Food and Agriculture Organisation warns that many Asian countries may need to import a quarter of their rice, wheat and maize or corn by 2050. Last year the world faced a cereal crisis as wheat stocks dropped to a 30-year low. Demand for wheat and rice had outstripped supply for six of the previous seven years. Grain prices rocketed, resulting in civil unrest.

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Source: http://www.theaustralian.com.au/higher-education/a