A bull grazes on dry wheat husks in Logan, Kansas, one of
the regions hit by the record drought that has affected more than half of the
US and is expected to drive up food prices.
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.
"There will not be enough water available on current
croplands to produce food for the expected 9 billion population in 2050 if we
follow current trends and changes towards diets common in western
nations," the report by Malik Falkenmark and colleagues at the Stockholm
International Water Institute (SIWI) said. (Read further: Source)
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