What is hidden water? What is the other name for it? Explain this concept.
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The virtual water trade (also known as trade in embedded or embodied water), a concept introduced by Tony Allan, is the hidden flow of water if food or other commodities are traded from one place to another.
Virtual water is the amount of water that is embedded in food or other products needed for its production. ... For example, the virtual water content (in m3/ton) for potatoes is 160. Others examples - maize=900; milk=900; wheat=1350; soybean=2300; rice=3000; poultry=2800; eggs=4700; cheese=5300; pork=5900; and beef=16000.
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