Mr. Phillip O'Brien:

This is in the most recent IPCC working group 1 document produced in September. It provided the revisions for the greenhouse warming potentials for these gases. That is the first time it made this distinction. This is new information coming into the policy framework. A scientific distinction is being made between methane coming out of fossil fuels and bio-genic sources. This is a very interesting development and should certainly be considered at a policy level.