We are a bit pressed for time, so I would ask that we resume now.
We have with us for our second segment Mary Griffiths; Dr. David Schindler, from the University of Alberta; and William Donahue, an independent researcher in limnology and biochemistry.
Each witness will have ten minutes to present, and then we'll move on to questioning, as we normally do.
Dr. Donahue, I'm told that you'll be starting. So without further ado, please go ahead.