His theory is that the population of Monarchs has taken a huge drop since the early 90s when agriculture started growing GMO crops. Soon as I heard that he lost most of any credibility I might have given him. Apparently the Monarchs only feed on milkweed plants. Commonly known as a weed when they appear in crops. Yes, we use chemical herbicides to control weeds in our crops since there is no profit in growing weeds. And GM crops have nothing to do with it. We were using herbicides to control weeds 40 years before GM crops were even dreamed of. And apparently the Monarch butterfly was doing just fine up til the 1990s. And they were usually more hazardous chemicals than the widely used glyphosate that everybody likes to demonize today.
No, I don't work for Monsanto, but I do try to make a living growing their herbicide tolerant crops.
