Trade policy based on mindless superstition. Wheat and corn have been genetically modified by man since the dawn of human history - if the enviros really want to return to their Eden of no genetically modified food, we can pretty much throw every grain out of our diet and start digging for grubs and earthworms.
I tried that for a week. Lost 9 lbs and IBS abated. Think I'll do this for more weeks! Don't know how it works to get grain out but I like the personal results.