Secret 'Watch List' Reveals Failure To Curb Toxic Air

The Continental Carbon plant sits on the southern outskirts of Ponca City, Okla. Until August, the plant was on an internal EPA "watch list," for violating rules of the Clean Air Act.
The Continental Carbon plant sits on the southern outskirts of Ponca City, Okla. Until August, the plant was on an internal EPA "watch list," for violating rules of the Clean Air Act.