![Sources of Air Pollution](https://i3.wp.com/image.tmdb.org/t/p/w185/dWWOnBrFmSlW7qjkTOLdUF5qIiV.jpg)
Plot
A color film showing the principal sources of air pollution in the United States and discussing the consequences.
Writer | N/A |
---|---|
Director | |
Actor | Thomas F. Williams |
Country | United States of America |
Production | U.S. Office of Education, Department of Health, Education and Welfare |