Is it up to me to answer? I can start.
I have always held that you can't buy your way out of the climate change problem. It's not going to be enough. Money will certainly be required to develop the new technologies and to put in subsidies and incentives to get people to take them up, but I don't think you can solve this problem simply by pouring money into it. There has to be an element of political will and political leadership and political example.
Sorry, it sounds as though I'm preaching. I don't intend it to sound like that. But as the IPCC talks about, and our chair mentioned, it's a matter of lifestyles. It's a matter of aspirations. It's a matter of imagination. All of these are essential ingredients.
It's not just money. There are lots of things we can do that don't necessarily cost money, which mean slight changes in lifestyles, lifestyles which are not absolute in any way.
I can't give you a number. It's going to have to be significant for the technologies. But it shouldn't simply be money from the federal government. It should be money from provinces. It should take advantage of the self-interest of large-scale industry and the like.
There are a lot of aspects of that question to be answered.