NRC faults science behind ozone regs.
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D004787:Environmental Pollution / Q000331:legislation & jurisprudence / Q000517:prevention & control*; D006077:Government Agencies; D006262:Health; D006801:Humans; D010126:Ozone / Q000009:adverse effects; D014481:United States; D014484:United States Environmental Protection Agency
D010126:Ozone