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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“Lord, thy most pointed pleasure take
And stab my spirit broad awake;
Or, Lord, if too obdurate I,
Choose thou, before that spirit die,
A piercing pain, a killing sin,
And to my dead heart run them in!”
—Robert Louis Stevenson (1850–1894)