From our perspective, from the building sector, once the carbon price is at $50, it might have an impact, not necessarily on individual homeowners, but more on owners of a portfolio of buildings.
There's one example I can give you from British Columbia, which has had a carbon tax for a number of years that is now at $30. As an individual homeowner, when you heat with gas, it's a fairly small amount that you have to pay in carbon tax, but the University of British Columbia, for example, was paying about $2 million a year, so they were really taking strides to reduce that carbon tax, particularly in terms of transportation. Also, they invested in buildings to reduce the carbon tax it had to pay, by investing in more efficient and lower-carbon buildings.
I think it's really a matter of price. I think it will have an impact on portfolio owners, but not on individual building owners, because the carbon price will not be high enough. It would have to be at maybe $100 plus, where people stop looking at the energy cost and shift the cost strictly on the price of carbon.