Water scarcity and food shortages could force world into vegetarianism, warn scientists.

This article titled “Food shortages could force world into vegetarianism, warn scientists” was written by John Vidal, environment editor, for The Guardian on Sunday 26th August 2012 18.00 UTC

Leading water scientists have issued one of the sternest warnings yet about global food supplies, saying that the world's population may have to switch almost completely to a vegetarian diet over the next 40 years to avoid catastrophic shortages.

Humans derive about 20% of their protein from animal-based products now, but this may need to drop to just 5% to feed the extra 2 billion people expected to be alive by 2050, according to research by some of the world's leading water scientists.

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