Since Oregon wildfires destroyed thousands of homes and entire communities last week, heavy smoke has lingered in the air across the state. In many places, air quality reached record-breaking levels of danger, and continues to be hazardous in many populated areas. Perry Hystad is an associate professor in the College of Health and Human Sciences at Oregon State University, and has studied long-term and short-term health effects of air pollution. He says the long-term health impacts of wildfire smoke are still unknown. We talk with Hystad about his research, and how the lingering smoke is affecting Oregonians.