The population is increasing and the grain is very scarce in the future
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Churchill [2011-05-20]
What will the Earth can be 40 year later? The researchers tell everybody at the annual meeting of American Scientific Promotion Agency in 2011 that the Earth will be "identified with difficulty". It is unable to identify not refers to the high technology, but refers to the increase of population, the scarce of grain and the deficiency of resources.