Here's an interesting factoid:
Canadian oil sands are expected to become America’s top source of imported oil this year, surpassing conventional Canadian oil imports and roughly equaling the combined imports from Saudi Arabia and Kuwait, according to IHS Cambridge Energy Research Associates, a consulting firm.
This doesn't mean that oil sands have surpassed conventional oil, but that seems to be the direction we're heading. Which means a new source of oil that is plentiful, expensive, and ecologically problematic. I still don't understand why people can't just buy smaller cars and live closer to work.