I think the The oil industry loses this one:

The Supreme Court said Monday it will decide if Los Angeles can go beyond the federal Clean Air Act to impose tougher antismog rules for city buses, airport shuttles, taxis and other vehicles.

The court agreed to hear an appeal from oil companies and diesel engine manufacturers who claim that local pollution rules conflict with national standards. The appeal argued that the national Clean Air Act takes precedence over local rules for new car emissions.



The Supreme Court already said that states have to regulate at least to the federal level but may go above that level. The state of Califpornia has the toughest regulations when it comes to environmental protection. If the Court sides with the oil industry, the rest of the environmental rules (which is just about every one) will be in jeopardy. I'm for strong environmental protection laws as opposed to just regulating at to the federal standards. The federal government actually incorporated some of Californias regulations when they developed RCRA.