Certainly in the European Union, they've had a trading system for quite some time, and that's been one key piece of their overall approach to pursuing emission reductions. We have seen quite significant reductions within the European Union, but in other countries as well, a growing number, as I think this committee heard from my colleague John Moffet, and others, on this topic.
Pursuing fuel switching—countries have moved from coal to gas or from coal to hydro or other large-scale shifts in electricity generation—is generally considered an area of potentially low-hanging fruit. I know a Swiss colleague of mine used to complain that there are no emissions in chocolate or watches, and all their electricity is hydro, so it's very difficult to squeeze out emission reductions.