Ultimately, the bill may rest on a shaky premise, as Clean...

Ultimately, the bill may rest on a shaky premise, as Clean Air Act permitting provisions seem to have only a marginal effect on decisions by oil companies to invest in new refining capacity, ... Industry and government analysts alike agree that profit margins are the most significant factor, and record profits from high gasoline prices have encouraged a major investment in added refining capacity. Projects already reported or announced are expected to add nearly 600,000 b/d to our existing capacity over the next several years.