Clean Air Act(1970)
To cite the expert commentary:
O'Neal, Michael J. "Clean Air Act." Milestone Documents. Accessed July 4, 2015. http://www.milestonedocuments.com/documents/view/clean-air-act
To cite only the document text:
Milestone Documents. "Clean Air Act." Accessed July 4, 2015....
Wire mills spewing smoke along the Monongahela River, Donora, Pennsylvania, in 1910 (Library of Congress)View Full Size