I think it should be the other way around i.e 3:1.

Not sure if you can really say there is any waste as teh energy returned is greater than the energy invested therfore there is an energy profit. As long as there is a "profit" then they'll keep doing it.

It would eb intersting to see what the financials are on tar sands production. Does anyone have any data on that?

Oh, sure, it's 3:1, sorry!

Energy is wasted whenever you covert it from one form to the other (in this case thick, sticky tar to liquid oil). 2nd law of thermodynamics...

But you're right, they will keep "producing" it until hell freezes over.

Cheers,

Davidyson

Thank you for posting the link to the PDF web site. These presentations are fantastic.