Okay. I'm going to present three examples right now: Ottawa, Calgary, and Winnipeg. Those cities are part of very significantly changed watersheds. Ottawa has been urbanized in terms of the Rideau Canal and all of that. Winnipeg sits in an agricultural watershed and is obviously urban. Calgary is a very large urban city.
In each one of those urban areas, there are major rivers flowing through them. Each one of those rivers, in those very urbanized watersheds, is full of fish. They are very significant fisheries, especially the walleye and catfish fisheries just outside of Winnipeg. Also, the Bow River in Calgary is considered one of the finest trout streams in North America.
I've just given you three examples of a significant watershed change. Watersheds have been changed beyond recognition, yet we have three rivers that are full of a very diverse fish community and also support very significant recreational fisheries. Given your view on cumulative effects, how do you explain that?