Scientists have long known that wildfires pollute the air with soot and other fine particles that are dangerous to human health. But as Capital Public Radio's Amy Quinton reports, a new study shows that particle pollution from wildfires is much worse than previously thought.
The overall number of acres burned by wildfires in the U.S. is closer to normal so far this year. In California, however, the "new normal" includes larger and more frequent wildfires. Capital Public Radio's Ed Joyce filed this story.