Lack of Water, Growing Global Population Requires Mostly Vegetarian Diets to Sustain

With the global population expected to reach 9 billion by 2050, water scientists are issuing warnings about the kind of dietary changes the world needs to adopt in order to avoid major food shortages. To sustain to production of food able to feed the 2 billion new people expected to be on the earth, the global population will have to decrease its consumption of animal-based products from 20% of their daily protein to 5%, researchers say. This is because animal protein requires 5-10 times more water to produce than plant-based diets. Other noted options that can help feed the world include the elimination of waste, and increasing trade between countries in food surplus and those in deficit.

 

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http://www.guardian.co.uk/global-development/2012/aug/26/food-shortages-world-vegetarianism?newsfeed=true