I want to address that one.
Actually it has to do with a question from Mr. Choquette. He mentioned the same principle because the trend now, of course, is all toward densification. Mr. Choquette was talking about urban areas expanding into rural areas and what we can do. The trend in municipalities is toward densification, to develop more in the cities themselves. That itself, by definition, is going to put pressure on existing trees. We have to learn how trees can live in an area of more hard surface.
There are techniques, and they're not those what we call tree coffins, those little cement boxes that you described. That's a technology from the 1960s and 1970s. There's new technology available. One of them is called Silva Cells. It's a living system underneath sidewalks. They are cells that can support sidewalks and infrastructure but allow for soil so that tree roots can exist in the soil beneath the sidewalks. They're one of the best examples, and they're being used all across the major cities. If you're ever at Yonge and Bloor in Toronto—some of you may be there one day—take a look at the trees planted along there. This is a multi-million dollar project. They ripped apart the entire sidewalk system simply to incorporate these cells to allow the trees that they've planted to grow to maturity and maintain a very large size.
It is possible, but not under the technology that you described. In the technology you described, according to a study that I saw, the trees live an average of seven years. It's more like a replacement program, a job creation program, where the trees are literally replaced every seven years. The long-term solution is to invest big money and unfortunately--here's the plug again—that money is borne by the municipal tax base. It's a tax levy on the municipalities. They have to bear the brunt of trying to support a tree in a hard surface area.