This program presents a clear, forceful, and thorough exposition of the problems of air pollution: its causes; its effects on forests, streams, and human health; and the issues involved in correcting the problems. Narrated by Walter Cronkite, the program shows the consequences of air pollution in Shenandoah National Park, the Adirondacks, New England, Ohio, California, Mexico, Canada, and Eastern Europe. The program includes interviews with academics and scientists from the EPA, Harvard School of Public Health, the U.S. Forest Service, and the National Park Service. All sides of the issues are expressed. Since nothing really meaningful will be done about cleaning up the air until ordinary Americans understand the problems and their consequences, this is a very important program. (57 minutes)