There are many issues that lead to it, but the ultimate cause is the industrial development on the landscape. The proximate cause may be a wolf killing them because of the way the landscape has been changed. There are many reasons for caribou decline but the ultimate cause—and industry agrees with this—is industrial development. The question is how we rearrange our affairs on that landscape to protect as many caribou populations as possible.
On May 7th, 2013. See this statement in context.