How L.A.'s toxic smog changed America forever | Full Documentary | American Experience | PBS

The hazy journey to the Clean Air Act. In July 1943, dark, smoky clouds suddenly descended over Los Angeles, causing residents to complain of burning eyes, nausea, and difficulty breathing. People couldn't see across the street and visibility was so bad that cars crashed. With World War II raging, many feared a chemical attack by the Japanese, but it soon became evident that no foreign enemy was to blame.

Courtesy of American Experience | PBS on YouTube. Watch on YouTube ↗

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