"If they had to produce their own soybeans, they would need to use 28 million hectares, " says Cluff.

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"They decided they could not do that (use so much arable land for soybeans) -- so they import, " added Cluff.

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"On a per capita basis, China has half the arable land and a third to a quarter of the water than the global average, " says Merritt Cluff of the Food and Agriculture Organization in Rome.

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