The Tenth Circuit, in a 120-page opinion, reversed a lower court decision setting aside and permanently enjoining the U.S. Forest Service's Roadless Area Conservation Rule. In setting aside the rule, the lower court held that the Service violated the Wilderness Act of 1964 and NEPA.

A district court held that the FWS violated NEPA, but not the ESA, when it issued a special rule that specifies the protective mechanisms that apply to the polar bear as a result of its threatened status. In May 2008, the FWS listed the polar bear as threatened under the ESA.

A district court upheld the FWS's determination that sport-hunted polar bear trophies may no longer be imported into the United States under the Marine Mammals Protection Act (MMPA) as of the effective date of the ESA listing rule for the species.

A district court held that environmental groups and water associations may intervene in a lawsuit challenging EPA's TMDL for the Chesapeake Bay and its tributaries.

A district court dismissed the U.S. government's lawsuit against the current and former owners of a coal-fired power plant in Indiana County, Pennsylvania, for alleged CAA violations.

A district court held that the owner of a restaurant may seek prospective damages, and possibly punitive damages, against an oil company for damages stemming from a leaking UST at a neighboring gas station.

A district court held that a developer may be liable under CERCLA for response costs the former owner of contaminated property incurred at the site.

A district court held that a bank may go forward with its CERCLA and negligence claims against engineering and remediation companies that prepared and implemented an environmental remediation plan for property in which the bank holds an interest, but it dismissed the bank's strict liability

The First Circuit upheld a lower court decision dismissing a biomedical waste disposal company's §1983 claims against the Puerto Rico Environmental Quality Board for rejecting its proposed plans for dealing with accumulated waste.

The Second Circuit reversed a lower court decision dismissing a property owner's lawsuit against a zoning district that denied his variance request to build a single-family home on his land.