<i>Clean Air</i> begins and ends with a vivid case study of air pollution at the Clairton coke works, the largest such facility in the world. Against this background, Jones analyzes the development of pollution control policy beyond capability. He describes normal policy development as the gradual temporization of proposals, but that air pollution control deviated from the norm because of widespread public demand in the late 1960s for unrealistic controls. Jones's study further examines the development and implementation of policy at three levels-local, state and federal.