A California appellate court upheld a local air district rule that requires manufacturers of consumer paint thinner and solvent products to limit the use of ozone-forming volatile organic compounds (VOCs) in their products. The district issued to rule to satisfy its federal CAA commitments. A pa...

The California Supreme Court upheld an air district's technology-forcing rules that limit certain pollution-causing substances in paints and coatings. A paint association argued that the air district failed to show that technology necessary to meet the emissions limits set by the 2002 amendments...

The D.C. Circuit upheld four EPA rulemakings governing greenhouse gases. EPA issued the rules following the U.S. Supreme Court's decision in Massachusetts v. EPA, 549 U.S. 497 (2007), in which the Court clarified that greenhouse gases meet the definition of an air pollutant under the CAA. Petit...

The Fifth Circuit upheld EPA's decision to disapprove certain revisions to Texas' SIP. EPA disapproved the revisions concerning the state's "qualified facilities program" because it did not meet the minor new source review (NSR) SIP nor did it meet the NSR SIP requirement for a substitute major ...

The D.C. Circuit vacated an interim final rule issued by EPA that would allow manufacturers of heavy-duty diesel engines to pay nonconformance penalties in exchange for the right to sell engines that fail to satisfy nitrogen oxide requirements. In 2001, EPA issued a rule requiring a 95% reduction in...