I'd like to address the question from the point of view of agricultural residues. As Kory said, a big part of our story is sustainability, and as Bliss said, if we don't have successful agriculture, we don't really have a business.
From the point of view of gathering corn stover--the cobs and stocks and leaves--in western Canada or Quebec, we don't pretend to know more about land husbandry than the farmer. If you were the farmer and had a thousand acres and I came to you and said, “Listen, can I have the stover or the straw from your farm? I'd like 300 acres a year”, you'd say to me—and this is actually in real cases, some farmers have said to me—“Three hundred acres? You can have the straw from all 1,000 acres”, or they've said, “Three hundred acres? You can't have any.”
It depends on all sorts of issues around soil types and farming practices and whether they want to switch from low-till to no-till agriculture. The point is that we leave that decision up to the farmer. He decides how much residue he wants to part with. Typically, it's about one-third to no more than 50% of the available residue, and then he rotates the land that he takes the residue from on an annual basis.