For every federal regulation we bring forward, we publish an impact assessment, which provides—again, based on our analytical work—a very detailed assessment of not only the emissions reductions that will be achieved by the federal measure but their costs and benefits. That's part of all federal regulation. The specifics on any single regulatory initiative are there.
It's important to look at this in the context of an integrated modelling framework, because there are interaction effects. You can do that measure by measure, but it's very important to look at the interaction. When you do the interaction, it's not always easy to point to a single measure and say, “this accounted for x amount.” You have those two points of analysis that I think provide the basis to think it through, but it is vitally important to constantly look at an integrated modelling result when you're looking at emissions projections and the potential impact of any proposed policy measure.