Okay, thanks.
Dr. Griffiths, it's lovely to see you. Thank you for coming out of your retirement to help us out. It's very appreciated.
We haven't looked at the North Saskatchewan River, and it's helpful that you mentioned it. I think it's important for us to understand the scale and the breadth of impact of the tar sands development. It's not just in the immediate Fort McMurray area. I wonder whether you could elaborate a bit more on the implications for water of the upgraders, if they proceed.