What does the term “virtual water” refer to? Is it still used?



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    Professor John Anthony Allan from King’s College in London created the idea of virtual water.  It is a term used to discuss the amount of water that a particular job necessitates.  For instance, in order to produce one metric ton of wheat, 1,300 cubic meters of water is needed.

    Allan proposed that this concept may help us in the future when dealing with shortages in water.  If we know the virtual water that goes into any given product, then we can better prioritize our distribution of water supplies. 

    The term is still used, though not everyone agrees on how useful it really is.

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