Certainly, I've been working probably for the last 10 years trying to do some projects at a cement plant in Mississauga. There are some very serious political and social issues in the neighbourhood, but the technology is such that the last time we looked at it, it was taking waste wood from our waste streams: off-cuts from housing, stuff from your house, old furniture, etc.
We looked at whether or not we could use the waste wood in the cement kiln. It's a very valuable source of fuel for some concrete plants in the world. In Germany, I know the Herhof plants, for one, produce a product called Stabilat that's fed into the concrete plants. It's very definitely a very viable option.
In Quebec, there are a couple of plants doing that already. In Ontario, most of the plants are burning some liquid waste—waste fuels, solvents, and that sort of stuff—and they do so with the full approval of the ministry of the environment.
Just before the last election in Ontario, there was some work put forward to start looking at heavily industrialized sources burning coal. That sort of died with the election, but the object there was that they were going to exempt, with due course, some of those processes from some of the environmental approvals required to do it. It is a very valuable process around the world and I know it's being done in Quebec.