The court holds that the U.S. Environmental Protection Agency's (EPA's) construction of the Clean Air Act (CAA) in promulgating the revised national ambient air quality standards (NAAQS) for ozone and particulate matter (PM) effects an unconstitutional delegation of legislative power and remands the...

The court holds that the Office of Surface Mining Reclamation and Enforcement's (OSM's) denial of a surface mining permit to a company was not a taking. The company's mining plan would invade the rock strata overlying an aquifer that supplies a local community with drinking water. The court first ho...

The court holds that the U.S. Environmental Protection Agency's (EPA's) practice of overfiling in those states where it has authorized state enforcement of the Resource Conservation and Recovery Act (RCRA) oversteps the Agency's authority under the Act. EPA initiated a RCRA enforcement action agains...

The court denies in part and grants in part the U.S. Environmental Protection Agency's (EPA's) petition for rehearing of a decision holding that EPA's revised national ambient air quality standards (NAAQS) for ozone were not based on intelligible principles in the Clean Air Act (CAA) for setting suc...

The court holds that it lacks jurisdiction to review a mining corporation's Resource Conservation and Recovery Act (RCRA) claims arising from a U.S. Environmental Protection Agency (EPA) document addressing whether certain mining processes produced hazardous waste. The document discussed the rare ea...