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A century of preserved family hair reveals one of America's greatest environmental success stories. After regulations banned lead from gasoline and paint, human exposure plummeted to 1% of what it once was.
Americans today have 100 times less lead in their bodies than their great-grandparents did, thanks to environmental regulations that transformed public health. Hair samples spanning a century reveal one of the most dramatic pollution success stories ever documented.
Scientists analyzed a century of human hair samples and found lead levels dropped 100-fold after the EPA banned leaded gas in the 1970s. This remarkable study proves environmental regulations can transform public health within a single generation.
Century-old hair from Utah family albums reveals lead levels dropped 100 times after regulations kicked in. The proof that environmental protections work is literally written in our DNA.
Scientists analyzed nearly a century of human hair samples and discovered lead levels dropped 100-fold after the EPA banned leaded gasoline in the 1970s. The study proves environmental regulations work when we need that reminder most.