There are obviously costs. When we saw the wildfires last year, it was obvious that the people who were suffering from respiratory illnesses and who were in these surroundings were suffering from the wildfires, but it's very difficult to estimate these costs. In good part, that's why we have not tried to estimate these.
Another reason is that even if Canada were to emit zero greenhouse gases, there would still be climate change because of what happens, and what would continue to happen, in other countries. That's why it's very difficult to estimate the cost of climate change and put that in perspective with the cost of acting on the climate.