A federal appeals court struck down plans by the Trump administration to delay regulations on oil and natural gas drilling.
The regulations — put in place by the Obama administration — aim to limit methane pollution from oil and natural gas wells.
The court's decision is a blow to Environmental Protection Agency Administrator Scott Pruitt's goal of environmental deregulation.
The main pollutant the regulations are concerned with is methane. Under the rule, oil and natural gas companies were required to monitor and plug any methane leaks they detected. Some companies say they were already trying to reduce methane leaks, but the new rule would make some wells unprofitable.
The EPA decided to delay enforcement of the new rule because, it argued, the Obama administration didn't give stakeholders a chance to comment on the regulations. But the court didn't think the evidence supported that argument.
Before heading the EPA, Pruitt was the attorney general of Oklahoma and was one of the plaintiffs suing the agency to overturn the methane regulations at the time.