Chalo said:But with tar sands, oil shale, fracking, etc., the problem is only compounded. High energy costs have resulted in a situation where producers are willing to burn up a great deal of fossil energy just in the process of extracting the pay dirt. So when this stuff is used, it represents carbon emissions much higher than just the carbon it contains.
Well, sort of.
The high energy costs of imported oil are what make domestic production from unconventional sources economically feasible at all. Unfortunately there is a lot of stuff sitting in the ground waiting to be extracted. The advancement of drilling and processing technology, plus government subsidies has made those sources cost competitive.. so we are, unfortunately, further away from peak oil than most folks expected. But the clock still ticks for big oil.
Yes, the carbon emissions are higher than the carbon it contains, for sure. I read somewhere that the canadian tar sands operations basically throw away 1 barrel of oil per 6 barrels produced. It is really awful.