Here's my question.
When the government announced its pan-Canadian framework on clean growth and climate change in October of 2016, it also announced the price, starting at $10 a tonne and moving to $50 a tonne by 2022. The assumption at the time was that this would be an economy-wide price, a price not only across all economic sectors but also across the entire country, and hence when provinces stepped up to the plate, the federal backstop would kick in.
Let's use 275 megatonnes as the rough number for emissions from those four provinces. The effective price is quite a bit lower than that. If the backstop is covering almost all of the emissions in those four respective provinces, in 2019 you get an effective price of roughly $10 a tonne across those economic sectors, and by 2022 you get an effective price of roughly $25 a tonne, rather than $50 a tonne.
I point that out as a disconnect between the price that was announced three years ago and what the effective price is. Most economists have indicated that they think Canada needs to go to an effective price of $130 a tonne or more by 2030 in order to meet the Paris accord targets.