Browse Items (2 total)

Across the country, industries are major sources of air pollution in both large cities and smaller communities. This smoke-spouting plat is the Bethlehem Steel Company in Johnstown, Pa. The photo was made in 1963.

The air pollution control program in Chicago, Ill., has been called one of the most effective in the nation. Unmanned, automated stations placed atop city buildings beep back air pollution readings to the control headquarters downtown. Here a member…