I think the big environmental change on territory in the north is around mining. The concern there is terrorism, smuggling, those sorts of things. It's already opening up. That's obviously something that Canada is going to have to be watching for. It's still more of a coastal maritime issue because the land mass is still huge. I don't see a large need to defend actual land mass except for along the coast where the mining has access to the Northwest Passage, etc.
On March 25th, 2014. See this statement in context.