I'm not sure I have a great deal to add other than the fact that over the course of the past several decades, a lot of the investment going into refineries has been in order to comply with increasingly stringent quality demands imposed on the industry. I would argue that the mandated investment has taken away from the ability of refiners to put more capital into growth investment as opposed to compliance investment.
I think that's the real take-away here. There's a need for continued examination of the impacts of the manufacture and consumption of petroleum products, but those initiatives do come at a cost.