Should Canada be worried about global warming?

This is kind of a stupid question, but global warming would be a good thing for Canada would it not? Vancouver would be the new Los Angeles, while Toronto would be the new Miami. And perhaps the Northwest Territories, Yukon and Nunavut would finally be inhabited by more than like 100 000 people.
Update: I just think I should note that I am not trying to be ignorant here. I understand the environment is a serious concern and that Canada should not just sit back and let it happen.
Update 2: Kano: We have since opted out of the Kyoto treaty though, have we not? Nevertheless it took us something like 10 years to opt out. I guess Canada just didn't want to look like the bad guy?
10 answers 10