Horticultural therapy, not an escape from reality but into reality. I think some of us appreciate that. I know I'm fortunate enough to live on acreage on Vancouver Island. I have my little trails through the trees behind the house that I maintain with a lawn mower. When I'm contemplating the challenges of the universe, I like to walk those trails. I really miss that time out there if I'm away too much. We appreciate the concepts you're bringing up today.
I want to pick up on one of your comments, Ms. Dobbie, about having a conference with urban developers on how trees grow. I want to tie that in with a question I heard earlier about soil volume. I walk in urban areas. There's concrete everywhere and I see trees that are planted in little holes hardly bigger than the tree trunks. I wonder how those trees could possibly survive. Maybe there is a water supply underneath the trees. Maybe you could comment on that and how big a problem it actually is.