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.
On February 29th, 2012. See this statement in context.