On a tangent, do you remember that old AWIMBer, Hillary? I seem to recall him being rather obsessive about all things green but his favourite comment was this, and I paraphrase but only ever so slightly:
'oil is at $147 a barrel for one simple reason only, we're running out of it'
I was never too sure what was more absurd, the idea that we couldn't possibly find more oil or better ways to extract it, or the idea that the price of a commodity in global financial markets was driven only by the most simple law of supply and demand.