http://www.aboutmyplanet.com/green-news/president-sands/
It is no secret that if you call yourself an environmentalist, you are not a fan of the oil sands in Northern Alberta. The tar sands, as they are commonly called, use an extraction method that differs from normal oil drilling. Tar sand oil production releases much more carbon emissions and is much dirtier than typical oil drilling. This makes it a highly destructive process to get a little bit of oil. It is also incredibly costly. For the reason that there is so much activity up there, many experts say that it is a sure sign we are at peak oil and are looking for unconventional sources of oil.