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The lack of water is a growing, global problem that seems intractable. While the UN estimates that a large majority of the water we use goes on irrigation, researchers have been working on a range of ideas that make the water we use in agriculture last longer. There has been a great deal of excitement and some dramatic headlines in recent weeks about a product that is said to have the potential to overcome the global challenge of growing crops in arid conditions. [Source: BBC News]
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