This was such a howler, and so easily sourced and discredited, it very much casts suspicion on the rest of the article:
“Also, the US is a net importer of food, so food shortages would take place.”
see:
http://www.ers.usda.gov/AmberWaves/February08/DataFeature/
I suppose. But I also recall all the naysayers around here that said the housing collapse would never happen.