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...

The Fifth Circuit dismissed environmental groups' petitions challenging DOI's approval of 16 oil well exploration and development plans that were issued between March 29 and May 20, 2010, under the Outer Continental Shelf Lands Act (OCSLA). The groups argued that the agency failed to consider th...