I'll just to try to answer your question to be helpful.
We're going to see the potential for lower levels in the Great Lakes. We already do. I think we understand some of the reasons for that, and it has to do with evaporation, particularly the evaporation in winter. When you don't have ice cover like you used to, but you still have the winds going over the water, which is warmer than normal, and evaporation, you see lakes like Lake Superior with significantly lower levels than they've had. Now, it may be natural variability, but it may not be. That gets back to the risk management issue. This is a risk management issue.
If the Great Lakes are lower, you have, of course, big problems for industry and the population. You also have problems for navigation within the Great Lakes. We know that in the past, when the Great Lakes levels and the St. Lawrence levels have been lower, it's had an enormous impact, for example, on traffic at the port of Montreal. You simply couldn't get the big ships in there that they used to; there was not enough draft.
So for the area of the Great Lakes, you can certainly expect lower levels, and that will have significant environmental, ecological, and economic impacts.