I'm not going to give you any numbers, but I'll give you some different ways to evaluate that question.
As Senior Deputy Governor Wilkins highlighted, the most visible tangible risks are the costs of extreme weather events. We're seeing this happen with increasing frequency in the eastern half of the country. It manifests itself mostly in increased flooding, particularly in the west, but also in the north, and in increased forest fires.
One way to measure the cost of that—though I don't think it really captures the human cost—has been the Insurance Bureau of Canada, which can show you the quite dramatic increase it has seen in the last 20 years in its claims related to extreme weather.
With respect to the other costs, we're going to need to adapt to climate change. Some parts of climate change are irreversible, so we're going to have to invest in the ability to adapt to it. We're also going to have to invest, and we are investing, in mitigating climate change. Those investments will cost money, but not doing them is going to be a lot worse.