Thank you, Mr. Chair.
Once again, I thank the witnesses for their presence and their excellent work. Their statements were very interesting and instructive. Once again we have learned a lot and we are very happy to have heard them before the committee.
I would like to talk about what Mr. Bevington raised earlier, that is to say, the Asian carp and the problem of invasive species in general, which we have to look at.
Mr. McLaughlin, if memory serves, you referred to invasive species. You said that the problem was also attributable to human activity, which has increased the quantity of nitrogen and phosphorus. You also mentioned that human activity may have changed water levels, which could also have had an adverse effect on water quality in the Great Lakes and contributed to the proliferation of invasive species.
How do you explain the proliferation of invasive species in the Great Lakes?