Forty years ago, a team of researchers published The Limits to Growth, a study based on computer modeling. Its conclusions based on a "standard run" indicated a collapse of the global economic system around the middle of this century. 10 years ago, a study found a strong concurrence of the predictions with the reality of the time, and a similar study done recently shows similar results.

Smithsonian Magazine
http://tinyurl.com/7jcnmof

here is a chart from that :Name:  Futurism-Got-Corn-graph-631-thumb.jpg
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