The court holds unconstitutional the requirement in §609(a) of the Departments of Commerce, Justice, and State, the Judiciary, and Related Appropriations Act of 1990 that the executive branch initiate discussions with foreign nations to develop treaties to protect sea turtles, and holds that the Co...

The court affirmed a lower court's grant of summary judgment in favor of a power company charged with modifying its power plants without first obtaining permits in violation of the Clean Air Act's (CAA's) prevention of significant deterioration (PSD) provisions. The company updated its coal-fired ge...

The court vacates the U.S. Environmental Protection Agency's equipment replacement provision (ERP) rule, which expanded the routine maintenance, repair, and replacement exclusion from new source review (NSR) requirements by allowing sources to avoid NSR when replacing equipment that does not exceed ...

The court affirms in part and reverses in part a district court decision upholding National Marine Fisheries Service (NMFS) regulations providing a Native American tribe an allocation of the Pacific whiting fishery. In the 1850s, Washington State entered into several treaties known as the Stevens Tr...

The court holds that the New York Air Pollution Mitigation Law is preempted by the Clean Air Act (CAA) and violates the U.S. Commerce Clause. Under Air Pollution Mitigation Law §66-k, an electric generator is assessed an offset penalty when it sells a sulfur dioxide (SO2) allowance to a generator i...

The Sixth Circuit affirmed a lower court decision that dismissed plaintiffs’ pre-enforcement challenge to the anti-animal-fighting provisions of the Animal Welfare Act (AWA) on the grounds that plaintiffs lacked standing. The court held that none of plaintiffs’ claimed injuries were sufficient t...

A district court granted in part and denied in part environmental groups' motion to preliminarily enjoin all logging of suitable spotted owl habitat on private lands in owl circles outside of spotted owl special emphasis areas throughout the state of Washington. The court granted the groups' request...

The D.C. Circuit granted in part environmental groups' petition for review of a final rule promulgated by the U.S. Environmental Protection Agency (EPA) to regulate "hot spot" analyses undertaken as part of the State Implementation Plan for National Ambient Air Quality Standards transportation proje...

The court dismisses a property owner's Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), Resource Conservation and Recovery Act (RCRA), Federal Water Pollution Control Act (FWPCA), and state common-law claims against prior owners of the property and a state agency for r...

The court upholds a Federal Aviation Administration (FAA) rule that was promulgated pursuant to the Overflights Act and designed to reduce aircraft noise from sight-seeing tours in the Grand Canyon National Park. The Act required the Secretary of the Interior, via the National Park Service (NPS), to...