July 30, 2014 - Seventy percent of world water use is for irrigation.
Each day we drink nearly 4 liters of water, but it takes some 2,000 liters of water—500 times as much—to produce the food we consume.
1,000 tons of water is used to produce 1 ton of grain.
Between 1950 and 2000, the world's irrigated...
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