From Future Pundit:
A small percentage change in China's agricultural output would cause a large increase in China's demand for grain crops.
Global grain markets are facing breaking point according to new research by the University of Leeds into the agricultural stability of China.
Experts predict that if China's recent urbanisation trends continue, and the country imports just 5% more of its grain, the entire world's grain export would be swallowed whole.
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My Comment: One can also say the same thing with India when it starts its industrial/technological revolution.