Mike: "I didn't mention this in the piece but oil sands production generates twice as much nitrogen and sulpher oxides as conventional oil production; and GHG emissions are almost three times as much as conventional oil (average) production."

That's interesting. What's the direct source on those GHG emissions from the oil sands production? I'd like to know why that is.
A large part of the GHG emissions is from burning NG itself in the extraction process; it would be good to ascertain that the NG-related GHG is not double-counted. Its on my list of things to investigate - the actual breakdown.