With the vacuum of leadership in Ottawa, it was inevitable that provinces start going their own way.
It's kind of ironic. Business leaders have been great supporters of devolution of power to the provinces, as has Harper's brand of conservatism. The thought is that it's easier for industry to bully provinces like Saskatchewan, New Brunswick or PEI, than making the Feds kowtow. When provinces actually start diverging with respect to regulation, suddenly it's all "Whoa, Whoa, we need common standards."
CO2 emissions standards are coming in one form or another (remember BC's carbon tax), it would be better for Harper to divert his attention from his scorched earth politics and actually try to achieve something useful.