Okay, thank you very much.
Monsieur Bigras raised this issue with you, and I wanted to raise this as well. In your brief, which we unfortunately just received, and I was trying to go through it while you were presenting it, you mention that you thought it was very important to underpin any targets we come up with with rigorous economic analysis. The Clean Air Strategic Alliance, and you and I are on the board, always agreed to that. My question is whether you also think it's equally important that there be clear scientific analysis of any of those targets.