An environmental assembly says large wildfires and severe heat events are happening more often are worsening air pollution across the western United States. A study had found that these concurrent air pollution events are increasing not only in frequency but duration and geographic extent across the region. The study, published in Science Advances, found that such widespread air pollution events are not only increasing in frequency but also persisting longer and affecting a larger geographic extent across the region. They have become so bad that they have reversed many gains of the Clean Air Act. The conditions that create these episodes are also expected to continue to increase, along with their threats to human health.
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