Of course we do. When you're moving forward to try to put regulatory mechanisms in place, you're thinking about how you would advance the environmental efficacy of these products. At the end of the day, what we're talking about here is enhancing the requirements on engine manufacturers with respect to the pollution that's produced through the engines.
What you're talking about is an after-market solution. Certainly, we are bringing ourselves into alignment in terms of reducing air pollution such as nitrous oxide. We're bringing ourselves into alignment with many countries around the world, including the United States, which is requiring engine manufacturers to become cleaner.