I think the common definition of sustainability that's usually used is meeting our needs now without compromising our resources to meet our needs in the future. Another way that I would look at it is—I don't know if you guys have heard of the “100-mile diet”—eating food grown within 100 miles. We're trying to shift that idea to the 100-year diet, meaning being able to have the resources and the resource base to be able to eat well in 100 years. That's how we would look at it.
