A district court granted five states' motion to preliminarily enjoin BLM from implementing its 2024 rule that requires oil and gas operators to flare rather than vent excess methane gas to prevent waste and conserve resources. North Dakota, Montana, Texas, Wyoming, and Utah argued the rule exceeded ...

In a per curiam opinion, the D.C. Circuit granted industry groups' petitions and denied environmental groups' petition to review EPA's application of a 2022 rule that classified industrial boilers built after 2010 as "new" rather than "existing" sources of hazardous air pollutants. The industry grou...

In a per curiam opinion, the D.C. Circuit dismissed in part and denied in part challenges to EPA's 2022 denial of pending Renewable Fuel Standard (RFS) exemption petitions filed by small refineries. EPA had determined the only costs relevant to showing economic hardship were those caused by complian...

The D.C. Circuit denied a chemical manufacturer's and two trade groups' petitions to review EPA's 2020 rule regulating emissions from miscellaneous organic chemical manufacturing facilities. The petitioners challenged EPA's assessment of cancer risk from exposure to ethylene oxide emissions. The cou...

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...