Welcome to the witnesses.
Mr. Burden, we know each other, of course. Not only are you the director for the Arctic area which encompasses the north, but you're also responsible for the most southern and largest freshwater fishing port in the world. That is in the riding of Chatham-Kent—Essex, in case any of you didn't know that.
It's good to see you, and it's good to see that you have a good handle on what's happening here.
My question can go to either one of you, I guess, but it's possibly more for Ms. Sauvé.
This issue of ocean acidification, I've got to tell you, is a new one to me. Could you explain to the committee what that is and where it's coming from?