Actually a well implemented carbon tax will help the economy by reducing externalities and leading to diversification, as you can see in BC. The carbon tax is one reason BC has the strongest and most diversified economy in Canada. Is Canada enough to tip the scale on global warming? Of course not. We are a small economy. But that does not remove our moral obligation to do everything we can. This is an ethical issue and the people who say that because Canada is a small player it need do nothing are ethically empty.