I think there is some work being done up north in the Northwest Territories and Yukon. There are some that are, as I understand it, exporting to other regions of Canada. I'm not too sure how big it is at this point.
There are a lot of different projects being done to try to figure out how greenhouses can be used to have production year round up north. They do have issues of lighting, of course. They have to see whether it's affordable or not.
There are different shapes and sizes, and different kinds of technologies that are being used. I think it's still very much in the prototype and experimental stages.