The D.C. Circuit vacated FERC's approval of an expansion project for a natural gas pipeline that runs through New Jersey, New York, Delaware, Maryland, and Pennsylvania. Environmental groups petitioned to review the approval, arguing FERC arbitrarily overlooked significant environmental consequences...

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 ...