A district court denied two aviation associations' motions to intervene in a case asking the court to order EPA to use its authority under the CAA to regulate greenhouse gas emissions from marine vessels, aircraft, and other nonroad vehicles.

A district court held that FWS complied with NEPA when it approved the opening and expansion of sport hunting in 60 National Wildlife Refuges. Between 1997 and 2005, the FWS issued nine final rules creating or expanding recreational hunting opportunities on 60 wildlife refuges.

A district court, on motions for summary judgment, held that a property owner may go forward with its CERCLA claims against a printing company for environmental contamination stemming from the company's operations, but it dismissed the owner's RCRA claims against the company.

Massachusetts' highest court vacated a nuclear power company's action seeking a judgment declaring that state regulations governing cooling water intake structures (CWIS) exceeded the state environmental agency's authority under the commonwealth's Clean Waters Act.

A Michigan appellate court upheld the state environmental agency's concentrated animal feeding operation (CAFO) rule.