You can put in place any system that prices carbon and that gives oil and gas companies an incentive to themselves invest in carbon capture and sequestration, if they feel like it. That's the approach that we would advocate, that you set the targets, you put in place a carbon price, whether it's a carbon tax or a cap and trade system--actually, there are hybrids that probably would work best--but at the end of the day, I don't see any reason why it should be the public that picks up the tab for oil and gas companies taking responsibility for the pollution they produce.
On February 4th, 2008. See this statement in context.