The Tenth Circuit affirmed an EPA order denying an environmental group's petition to object to a CAA Title V operating permit for a coal-fired power station in Colorado.

The Tenth Circuit upheld an EPA rule in which it rejected Oklahoma's regional haze plan to limit sulfur dioxide emissions at electric utility power plants and replaced it with its own more stringent regulations via a federal implementation plan (FIP).

The Third Circuit upheld an EPA rule imposing sulfur dioxide (S02) limits on a coal-fired power plant in Pennsylvania whose emissions travel directly across a river into areas of New Jersey.

The D.C. Circuit denied states' and industry groups' petitions challenging EPA rules establishing CAA permitting requirements in states that do not have implementation plans for greenhouse gases.

A California appellate court held that the California Air Resources Board (CARB) violated the California APA and the California Environmental Quality Act (CEQA) when it adopted its Low Carbon Fuel Standards (LCFS) regulations to reduce the carbon content of transportation fuels sold, supplied, or

The D.C. Circuit ordered the Maryland Department of Environment to act on a natural gas company's application to construct a natural gas compressor station in the state. The company applied for and received a certificate of public convenience and necessity from FERC.

A district court upheld an SEC rule imposing certain disclosure requirements for companies that use "conflict minerals" originating in and around the Democratic Republic of the Congo.

A D.C. court held that a climate scientist may go forward with his defamation suit against a conservative publication and think tank.

A district court held that the U.S. Forest Service complied with NEPA when it promulgated the land and resource management plan (LRMP) for the Beaverhead-Deerlodge National Forest in Montana.

The Ninth Circuit reversed a lower court decision dismissing a conservation group's CWA citizen suit alleging that a scrap metal company violated California's general NPDES permit for industrial stormwater at three of its scrap recycling facilities.