There can be no effective control of corporations while their political activity remains. to put an end to it will be neither a short nor an easy task, but it can be done ... corporate expenditures for political purposes, and especially such expenditures by public-service corporations, have supplied one of the principal sources of corruption in our political affairs.
I should say that canada is one of the major criminals, not just the tar sands and so on, but even mining throughout the world, a lot of it is canadian. It's extremely destructive, so an important thing for canadians to do is curtail the predatory and destructive behavior of their own government and corporations. A carbon tax is one way of doing it.