Yes, certainly there are good international standards that we could compare them to. I don't have the actual numbers here with me today, but I certainly could forward them to your committee. As you can imagine, there is great variance between those in the United States and those in Europe, which would be the ones I would draw examples from. They vary for particulate matter or for ground-level ozone or for other substances. Some of them are lower than ours, and some of them are actually higher than ours. So if we're talking about particulate matter and ozone, I think we're probably in the middle of the international pack at the moment. Certainly, there are some that could come down lower.
It's important to make a distinction between what we're talking about here, because our standards are for ambient air levels of air pollution. They're not for emissions that come out of stacks. There are two separate measurements. We would like to see greater regulations for the emissions that come out of stacks, as well as for ambient air levels.
I don't know if that helps you.