The Court held that the U.S. Environmental Protection Agency (EPA) has the statutory authority to regulate greenhouse gases (GHGs) from new motor vehicles. The case arose after private organizations petitioned EPA to begin regulating four GHGs, including carbon dioxid (CO2), under the Clean Air Act....

A district court upheld the U.S. Army Corps of Engineers' decision to issue a CWA §404 permit to a mining company for the construction of a valley fill and sediment pond in conjunction with the Reylas Surface Mine in West Virginia. The Corps' adoption of a compensatory mitigation plan that will rep...

The Supreme Court of Hawaii vacated and remanded the interim instream flow standards set by Hawaii's Commission on Water Resource Management for the Waihe'e River and the Waiehu, 'Iao, and Waikapu streams, collectively referred to as Na Wai 'Eha, or "the four great waters of Maui." In considering th...

The Ninth Circuit upheld an EPA Environmental Appeals Board (EAB) order denying a native village's petition for review of an NPDES permit authorizing the discharge of wastewater from an Alaskan lead and zinc mine. The village failed to demonstrate why EPA's responses to comments were clearly erroneo...