The Tenth Circuit dismissed an environmental group's citizen suit against an Oklahoma power company for CAA violations at a power plant. The group claimed the company modified a coal-fired boiler without first obtaining an emission-regulating permit as required by the CAA. But because the group file...

The Ninth Circuit dismissed an environmental group's appeal of a preliminary injunction that barred it from interfering with oil exploration activities in the Chukchi Sea. The group challenged the injunction on several jurisdictional bases, as well as on the merits. But the injunction has expired an...

The D.C. Circuit dismissed environmental groups' lawsuit seeking to vacate an EPA rule that implements the CAA's new source review (NSR) permitting scheme in nonattainment areas. The groups filed suit after EPA issued an energy company a PSD permit to build a waste incinerator in Arecibo, Puerto Ric...