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20th-century American engineers
20th-century American inventors
Members of the United States National Academy of Sciences
1944 deaths
Environmental controversies
Air pollution
Human impact on the environment
20th-century American chemists
1889 births
Cornell University College of Engineering alumni
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Ozone depletion
Inventors killed by their own invention
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Deaths by strangulation in the United States
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People from Beaver Falls, Pennsylvania

Thomas Midgley Jr.: discussion

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