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18 A Century of Hair Samples Proves Leaded Gas Ban Worked

Slashdot
msmash @ Slashdot 2 place · 02/02/2026 21:30 EDT

A Century of Hair Samples Proves Leaded Gas Ban Worked

Scientists at the University of Utah have analyzed nearly a century's worth of human hair samples and found that lead concentrations dropped 100-fold after the EPA began cracking down on leaded gasoline and other lead-based products in the 1970s.

The findings, published in the Proceedings of the National Academy of Sciences, drew on hair collected from Utah residents -- some preserved in family scrapbooks going back generations. Lead levels peaked between 1916 and 1969 at around 100 parts per million, fel

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Slashdot
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