The D.C. Circuit denied a petition to review EPA's 2023 regulations that imposed new reporting requirements on biogas producers. An industry group argued, among other things, that EPA had no authority to regulate biogas producers and that three categories in the regulations—those related to biogas...

In a per curiam order, the D.C. Circuit denied states' and industry groups' motions to stay EPA's rule aimed at reducing pollution from fossil fuel power plants. Petitioners argued EPA acted arbitrarily and capriciously in determining that carbon capture and other emission control technologies were ...

The U.S. Supreme Court, 5-4, granted three states' and several industry groups' applications to stay enforcement of EPA's 2023 rule issuing a federal implementation plan (FIP) for 23 states whose SIPs the Agency determined had failed to adequately address new air quality standards for ozone levels u...