EPA says it intends to release its eagerly anticipated proposal to roll back tougher Biden-era federal air quality standards for fine particulate matter (PM2.5) this fall, with a final rule due in February, as the agency seeks to keep a lawsuit on the issue in abeyance, although environmentalists will likely oppose any further litigation delay. In an Aug. 13 motion to govern proceedings in Commonwealth of Kentucky, et al. v. EPA, et al. , EPA seeks a further 45-day abeyance...