First of all, the research has consistently demonstrated that the price on carbon in B.C. has reduced emissions. There have been at least half a dozen studies that reach the same conclusion with a lot of different datasets and approaches.
In terms of how high it has to get, as Mr. Beugin mentioned, each increment in the carbon price will cause an increment in emissions reductions. I wouldn't expect any carbon price to see wholesale elimination of heating in buildings or driving. I think we'll see different technologies and fuels used for both of those activities.