Ozone smog is improving, but wildfires in the West continue to expose people to dangerous pollutants, according to a new report.
Citizen of the Planet / Education Images/Universal Images Group via Getty Images fileFewer people in the U.S. are breathing unhealthy air now than a few years ago, but California and other Western states are seeing more dramatic short-term spikes in air pollution, according to a report the American Lung Association released Wednesday.
The report scored air quality in cities and counties based on their average levels of ozone smog, as well as short-term and year-round particle pollution. "What we saw this year was ozone pollution in most parts of the country got better. Ozone has been slowly getting better, but this was a pretty dramatic improvement," Pruitt said.California cities dominated the report's rankings of the most polluted metropolitan areas in the U.S.
L.A.'s geography also provides ideal conditions for ozone to form, since the surrounding mountains prevent air pollution from dispersing — what Peltier referred to as a “bathtub effect.”
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