The D.C. Circuit dismissed as moot truck engine manufacturers' lawsuit challenging four certificates of conformity EPA issued to another engine manufacturer pursuant to an interim final rule that allowed certificates to be issued to 2012 and 2013 model-year engines even if the engines fail to confor...

A district court denied industry groups' motion to intervene in a CAA citizen suit concerning EPA's alleged failure to review the ozone NAAQS in a timely manner. The underlying lawsuit concerns whether EPA has failed to perform a mandatory duty to review the ozone air quality standards, and whether ...

The Eleventh Circuit affirmed a lower court decision dismissing environmental groups' claim that the U.S. Navy and the National Marine Fisheries Service (NMFS) violated NEPA, the ESA, and the APA in deciding to install and operate an undersea warfare training range in waters adjacent to the only kno...

The Supreme Court of Kansas reversed and remanded the Kansas Department of Health and Environment's decision to issue a prevention of significant deterioration (PSD) permit to a power company to construct an 895-megawatt coal-fired power plant. An environmental group filed suit against the state age...