Lucky for us, we have been lied to for many years. The real figures show that reducing consumption of fosil fuels is inevitable very soon. Harper and other oil industry spokesmen are just trying to have this reduction coinciding with the end of production (regardless of the CO2 content of the atmosphere.)
This is why he wants us to have targets for 30 to 50 years from now. By then, the USA will have exausted our fuels and moved on to other places.