Water scarcity's effect on food production means radical steps will be needed to feed population expected to reach 9bn by 2050
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Interesting article. This is something humanity as a whole must address and soon.
Take for example that you need something like 14 kilos of grain to produce 1 kilogram of beef. You could feed a lot more people with the grain than with the beef.
However, meat consumption is rising in many countries (especially places in Asia where increased wealth means increased meat consumption). In countries like Taiwan and Japan meat was an occasional luxury, but now people eat meat three meals a day.
Whether this happens or not remains to be seen (I doubt it will).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.