The American public is not aware that there might be potential allergenic and toxic reactions. With regular food at least people know which foods they have an allergy to.
We are already producing enough food to feed the world. We already have technology in place that allows us to produce more than we can find a market for.
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The public should know that the liability issues here have yet to be resolved or even raised. If you're a farmer and you're growing a genetically engineering food crop those genes are going to flow to the other farm.