A federal district court in Rhode Island has dismissed all the claims filed by the Auto companies seeking to strike down Rhode Island’s greenhouse gas regulations for new cars. The decision did not reach the merits of regulating greenhouse gases from automobiles. The Federal Court ruled that the Auto companies were prevented from challenging the adoption of the CARB like standards based upon prior federal court decisions.
The importance of the decision is that other states can now move forward with regulations adopting standards to control greenhouse gases from cars. Auto companies had been challenging state efforts to establish regulations on the basis both the Energy Policy Act and Clean Air Act pre-empt state efforts to establish regulations. This implication of this decision is that the Auto Companies can no longer challenge such regulations on that basis.
If you are interested in the legal background, here is a link to the decision.