We are doing a lot of work on that front. We're doing a lot of analysis, along with other departments, on carbon border adjustment, trying to figure out exactly how that might work and what its implications could be. The European Union is also well advanced in looking at carbon border adjustments.
I think the challenge we have is that while we've indicated to the U.S. that we have an interest in this issue, and they have responded by saying they want to engage with us to discuss this further, they are further behind than we are and the European Union in looking at this issue. They're also in a different place when it comes to what they've done domestically with respect to carbon pricing. Therefore, I don't think that we'll see a definitive view from the U.S. for a little while until they get their internal thinking sorted out, but we are very much eager to work with them in exploring these issues, along with others.