I think I said this in my opening, but just briefly, there are two situations that drive you to want it: You have significant carbon costs for your domestic producers and, once you're at that level, you have sectors facing significant imports that are enjoying an advantage, basically, from not paying the same carbon cost. That's what makes it sensible.
That's sensible regardless of what the source is, and it relates to jobs, Canadian companies, production, plants and so on. It's a level playing field.