A district court denied a motion to enforce its previous order vacating DOI's repeal of the Valuation Rule and reinstating prior regulations governing payment of royalties on oil, gas, and coal extracted pursuant to leases on federal and Indian lands.

A district court granted states' motion for summary judgment in a lawsuit concerning EPA's duty to limit air pollution drifting from upwind states into northeastern states.

The D.C. Circuit upheld EPA's 2018 decision to add a wheel-covering facility in Mississippi to the NPL.

The D.C. Circuit stayed a lower court ruling that ordered the Dakota Access Pipeline to be shut down and emptied of oil within 30 days.

The Second Circuit vacated and remanded a lower court ruling in a lawsuit concerning the discharge of thousands of gallons of oil from a submarine cable into Long Island Sound.

The Fifth Circuit vacated and remanded a lower court decision that imposed penalties against an oil company for alleged CAA permit violations at its industrial complex in Baytown, Texas.

The Fifth Circuit affirmed, 2-1, a lower court ruling in favor of fishermen's challenge to NMFS regulations regarding offshore aquaculture in federal waters of the Gulf of Mexico.

The Sixth Circuit dismissed as moot a lawsuit seeking to preliminarily enjoin EPA's 2015 Clean Water Rule that clarified the definition of "waters of the United States" under the CWA.

The Ninth Circuit reversed, 2-1, a lower court ruling denying a request to preliminarily enjoin a logging project in the Mendocino National Forest.