Canadian and U.S. tar sands the most polluting and least energy efficient energy project

From YouTube: The Canadian Tar Sands is the world's largest, and dirtiest, energy project. Dirty oil sands crude generates as much as five times greenhouse gas as conventional oil. Yet, unless steps are taken by the U.S. and Canada, both countries will become irrevocably addicted to the dirtiest oil on earth. Totally lame.