Unfortunately that is almost impossible to measure with our current tools (at least I have never seen it done convincingly, and I generally agree with you that

Unfortunately that is almost impossible to measure with our current tools (at least I have never seen it done convincingly, and I generally agree with you that this is ignored too much. Although I have to qualify that GMO-food is better than no food, while recognizing that in almost all cases, that's not anywhere close to what the choice boils down to). I think it was sama who said that factory farming is one of the things that in 50 years we will look back at in confusion over why anyone accepted it, and I tend to agree.