The Ninth Circuit upheld the dismissal of an environmental group's challenge to a CAA permit that allows an oil company to conduct "pollutant emitting activities" associated with a…

The Tenth Circuit affirmed an EPA order denying an environmental group's petition to object to a CAA Title V operating permit for a coal-fired power station in Colorado. In its petition for…

The Sixth Circuit vacated EPA's determination that a natural gas operation's plant and production wells separately located within a 43-square-mile area constitute a single stationary…