57:33
The search for clean air
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 pr...
26:37
Dirty little secrets: the impact of fine particle pollution
To most people, air pollution is a global issue. But what about the air we breathe every day - on the street, at work, and in our homes? This program studies fine particle air pollution and its public health hazards. Using detailed graphics that mag...