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...

The Ninth Circuit held that EPA did not act arbitrarily and capriciously when it disapproved in part Arizona's regional haze SIP and issued a replacement federal implementation plan (FIP) in place of the disapproved SIP elements. First, EPA did not act arbitrarily and capriciously when it disapprove...

A district court held that environmental and animal rights groups may challenge the constitutionality of two trespass statutes passed by the Wyoming legislature in 2015. Under the statutes—one imposing criminal liability and the other imposing civil—a person will be held liable if he or she: (1)...

A district court dismissed environmental groups' CAA citizen suit against a crude oil transloading facility for constructing and operating the facility without a prevention of significant deterioration (PSD) permit. The groups allege that the facility is required to have a PSD permit because it has ...