Some commenters (wearing rose-coloured glasses) suggest that the the world's dependence on oil will be over some time this century due to to improced technology. Whatever.  But notice what JT said.  He said, "We need to phase them out. We need to manage the transition off our dependence on fossil fuels.” He didn't say, "let market forces prevail" to shout down the oil sands.  He said "we need to" take action.  And when he says "we", he means government.  His priority is, through direct government action under his watch, to shut down the oil sands.  He must be stopped.  Buggy-whip factories closed due to technology and  market forces.  The 35mm film industry closed down due to technology and market forces.  The IBM mainframe  computer business closed down due to technology and market forces.  Let market forces, not Liberal tomfoolery prevail!