It seems to me that Global Warming would be a boon to our friends in the Great White North. Lower heating bills, and the breadbasket of North America moves several hundred miles north to Manitoba, Saskatchewan and Alberta. Tar sands could be mined more of the year, and less expenditure on icebreakers.
I doubt that it would give Labrador nice beaches, but perhaps they could enjoy a nice wine industry on Vancover Island and the Queen Charlottes.