Overall, Minnesota received good marks for air quality. The state’s “star” in the report, however, was Duluth.
Symptoms may not appear for weeks or even months after the initial exposure to the feather bedding, a factor that can delay diagnosis.
“It turns out the difference in loss of lung function between someone who smokes five cigarettes a day versus two packs a day is relatively small,” said said Dr. Elizabeth Oelsner, the study’s lead author.
The study also found that fewer people visit national parks when ozone levels climb.
The findings from Los Angeles International Airport suggest that the pollution affects a wider area that previously thought and that the impact is worse than from roadway traffic.