Certainly, the development and plan to build the refinery would encompass significant environmental regulatory reviews and approvals. But as Mark has pointed out, there are many other factors as well, so it's part of the factors that one would look at. Certainly, the economics between the premium achieved from upgraded, refined-in-Canada product and the price achieved in the market by doing it somewhere else—where the capital infrastructure exists—is one of the primary factors, but the timeline to build a refinery from a greenfield is estimated in the 5- to 10-year range, in terms of all the permitting and processes involved.
On November 28th, 2011. See this statement in context.