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Tile worker, 1930s

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A worker inside a tile-making factory, circa 1936, where exposure to large amounts of silica dust was common. 1.7 million American workers are exposed to silica dust each year. Photo courtesy of the CDC.

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About the author: Michael Halpern is an expert on political interference in science and solutions to reduce suppression, manipulation, and distortion of government science. See Michael's full bio.

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