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"At a recent meeting of the AAAS Michael Coe of Woods Hole Research Center pointed out that as corn prices skyrocketed several years ago, enough soybean fields were converted to corn production"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/renewable-energy/watch-greenhouse-gases-increase-swapping-soybeans-for-corn-in-us-has-ripple-effect-in-brazil.html>