Thank you. I have a quick question to Mr. Baker to follow up on that.
I think essentially we're trying to drive a full life cycle analysis of what it is to use each particular fuel. Is your company, is your agency, willing to subject itself to a comparison between, say, the biofuels and the ethanols being proposed and a barrel of oil out of the tar sands and do a GHG comparison? In terms of government policy, let's just make sure we get all our math right.