The nice thing about concrete kilns—I'm not a concrete guy, I'm a garbage and landfill guy, so I don't really know 100% of the technology—is that when you put stuff into the kiln, it pretty much encapsulates the waste. You have to worry about some of the exhaust coming off, but the slag that comes out of the back side binds a lot of that material up, so really when it comes out you have concrete slag and some air emissions.
Over time, you can show that this is a very viable way of handling waste. We aren't doing it in Peel, but certainly there's an example, again, in Quebec of a concrete plant that's taking industrial waste and putting it through a Stabilat process essentially—it's not a Stabilat process, sorry. It's from a Vecoplan process. But they clean it up, produce a fuel, and burn it in the incinerator, so it's viable.