More than 120million Americans — a third of the country — live in areas with dangerous levels of air pollution, a new report suggests.Between 2019 and 2021, cities on the West Coast — particularly — ranked among the highest polluted areas for ozone pollution and fine particulate matter air pollutants.Particle pollution refers to tiny pollutants from sources like factories, power plants, vehicles and wildfires, while ozone smog comes from vehicles, factories or other industrial sources.
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