Perhaps I could begin by categorizing them. Being the tax policy guy, I see the world as tax and everything else, so I focus on tax all the time, which makes me pretty boring, but there you go. Maybe I'll speak to the tax component of that.
Back in I think 2007, the G20 committed to essentially rationalize inefficient fossil fuel subsidies over the medium term. I guess in more recent years—I think in the last two or three years—that's been crystalized by some countries, including Canada, to mean 2025.