A federal appeals court rejects a bid by the U.S. Environmental Protection Agency to abandon or roll back 2024 soot pollution standards, dealing a blow to the Trump administration’s deregulatory efforts. The court’s ruling maintains the existing limits on harmful particulate matter, often referred to as soot, that were established in 2024. The decision is presented as part of ongoing legal challenges and scrutiny of EPA rulemaking, with the outcome limiting the agency’s ability to change the standards through the approach it sought in court. The reporting indicates the court’s action is a denial of the EPA’s request to discard the rule, meaning the 2024 restrictions continue to apply while the broader regulatory and legal processes proceed. Both outlets frame the ruling as a setback for efforts to weaken or remove the soot pollution limits and emphasize that the court does not grant the EPA’s attempt to end the rule’s effect. The case centers on whether the EPA’s legal and procedural grounds justify abandoning the 2024 soot standards.