Some Vintage Photos, Part 1/2

William A. Munroe, left, director of New Jersey's air sanitation program, and principal chemist F.B. Koppenhaver, look over automatic machine recording the amount of pollution in Trenton's air, December 20, 1963. Similar machines scattered about the state play an important role in finding out when the where major air pollution threats occur. (Photo by AP Photo)
Some Vintage Photos, Part 1/2
   
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