Well, that's a good question.
When we look at the clean fuel regulations, they're expected, by the government's own estimate, to reduce emissions by 26 million tonnes of CO2 equivalent in 2030. That's the stated impact, based on the government's own estimate. The carbon tax itself will also have an impact. I don't remember, off the top of my head, the exact number.
The point is that whether it's a carbon tax or regulations, both have a cost. It's a matter of how obvious and transparent the cost is.