The 1939 St. Louis smog was a severe smog episode that affected St. Louis, Missouri, in the United States in 1939. Visibility was so limited that streetlights remained lit throughout the day and motorists needed their headlights to navigate city streets.
Read more about 1939 St. Louis Smog: The Problem of Pollution Control, The Smog Episode and Its Aftermath
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“Night is a dead monotonous period under a roof; but in the open world it passes lightly, with its stars and dews and perfumes, and the hours are marked by changes in the face of Nature. What seems a kind of temporal death to people choked between walls and curtains, is only a light and living slumber to the man who sleeps afield.”
—Robert Louis Stevenson (1850–1894)