For five days in December 1952, ... It would take the rest of the world years to follow suit; the United States passed its own Clean Air Act in 1970, a full 14 years after the Great Smog.

The Road To The Clean Air Act Passes Through Pittsburgh. In many ways, the story of the Clean Air Act starts in Pittsburgh, Pennsylvania, decades before the federal law was signed.

The EPA on March 12 requested reconsideration of several Clean Air Act rules affecting coal- and oil-fired electric power generation, synthetic organic chemical manufacturing, ethylene oxide ...