For example, there is a greenhouse gas cap in Nova Scotia. That actually has nothing to do with the coal phase-out. That was before. Alberta introduced the specified gas emitter regulation, which has been increased in 2017 to $30, with a 20% emission cut. Ontario introduced a cap-and-trade system. This is recent, but Alberta's and Nova Scotia's regulations are older and have longer histories than the cap-and-trade system in Ontario.
The other thing is that there has been improvement in the system generally, related to transmission, for example. That is one thing that improved the efficiency of the system because you have less losses in the transmission.