While it's true that it requires more refining, that's not even the issue. It's the EXTRACTION that is the limiting factor. This isn't a pocket of oil that you just need to stick a pipe into. The oil is stuck is mixed with sand--hence "tarsands"--and it has to be dug up, trucked out, and then run through an extraction process.
---------- Post added 2012-06-27 at 02:48 PM ----------
Then it must be funny because it's not true.