Air pollution is a threat to health, especially of older persons. It contributes significantly to the rising rates of chronic respiratory ailments. It stains our cities and towns with ugliness, soiling and corroding whatever it touches. Its damage extends to our forests and farmlands as well. The economic toll for our neglect amounts to billions of dollars each year.

Lyndon B. Johnson: Containing the Public Messages, Speeches, and Statements of the President (ed. 1965)