A California appellate court reversed a lower court decision granting lumber companies' petition to delist coho salmon from the California list of endangered species.

A California appellate court affirmed a lower court decision denying a municipal water district's petition challenging a water replenishment district's "water emergency" declaration for California's Central Basin.

A California appellate court affirmed a lower court decision denying a conservation group's petition seeking to vacate a city's certification of an environmental impact report (EIR) for the development of a park.

The D.C. Circuit denied a petition for rehearing of an earlier decision in which it upheld four EPA rulemakings governing greenhouse gases. EPA issued the rules following the U.S. Supreme Court's decision in Massachusetts v. EPA, 549 U.S.

The Ninth Circuit denied an environmental group's petition challenging EPA's decision to grant two air permits authorizing exploratory drilling operations in the Arctic Ocean by a drillship and its associated fleet of support vessels.

A district court held that a mining company that operates a smelter in Canada is liable as an arranger under CERCLA for the release and threatened release of hazardous substances in the Upper Columbia River.

The Second Circuit reversed a lower court decision that an insurance company need not indemnify a manufacturing company for environmental contamination that occurred at one of its facilities in the late 1960s and early 1970s.