Massachusetts' highest court held that the state Department of Environmental Protection (DEP) failed to issue regulations setting limits on greenhouse gas (GHG) emissions, as required by…

New York's highest court held that material questions of fact prevent it from ruling on whether a narrow waterway within a remote area of the Adirondack Mountains is navigable-in-fact and…

The Court of Federal Claims held that residents and businesses in New Orleans' Ninth Ward and the neighboring St. Bernard Parish may file class-action lawsuits against the government for…

The Supreme Court of Colorado held that state law preempts a city's five-year moratorium on hydraulic fracturing and waste disposal within city limits. Although the Colorado Constitution…

The Supreme Court of Colorado held that state law preempts a city's ban on hydraulic fracturing and waste disposal within city limits. The Colorado Constitution recognizes the sovereignty of…

The D.C. Circuit, in an unpublished opinion, upheld an Interior Board of Land Appeals (IBLA) decision invalidating an individual's mining claims on federal land in Oregon. DOI made those…

The Supreme Court of Texas held that the Texas Clean Air Act and the Act’s enforcement mechanisms in the Texas Water Code preempt a Houston air-quality ordinance. The Houston ordinance’s…

The D.C. Circuit, in an unpublished opinion, upheld a lower court's grant of summary judgment in favor of the Bureau of Safety and Environmental Enforcement (BSEE) after it ordered an energy…

A California appellate court affirmed in part and reversed in part a trial court's summary adjudication in favor of the property owners in their dispute with a citizen's group over the…

A district court granted Missouri's remand request to litigate in state court its lawsuit against the owner and operator of a landfill in connection with an uncontrolled, underground trash…