Can I make a comment on that?
What happens is, of course, Monsanto and these companies do test plots, which would be a field sometimes not much bigger than this room. It's a lot different from a 300-acre field of canola or alfalfa. And you have a principle of what they call pollen load. There is a huge amount of pollen released by things like corn and alfalfa, less so with soybeans. Each crop is different, but there are studies in Australia, which I can't quote but I could find, where canola, under the pollen load conditions of a large field, will drift in the wind up to 15 miles, let alone weeds and everything else.
But there is more than just pollen. Contamination is in the transportation system. It's in the wind. Canola is a tumbling weed. It's the mustard family. That's how it propagates its seed. It flies across the land as a big bush. And alfalfa has a different system. Wheat is self-pollinating, but corn also drifts a long way. So each crop is different, and a buffer zone is only part of the answer. The whole system is the contamination issue.