Long-term Ozone Exposure Linked To Higher Risk Of Death, Finds Nationwide Study

A study analyzing two decades of data for 450,000 people across the nation found that long-term exposure to ground-level ozone, a major component of smog, raises the risk of death from respiratory ailments. It is the first major study connecting chronic exposure to ozone to elevated mortality rates, and could be used in future evaluations of federal standards for acceptable ozone levels.

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