Air pollution can expose your brain and body to disease-causing particles

This is Ask an Expert where every weekday at 9:20am on KCBS we're giving you direct access to top experts in various fields. We're learning more about how polluted air impacts the brain. Breathing in fine particles could put you at risk for several immune diseases. To tell us more, KCBS' Jason Brooks spoke with Dr. Marsha Wills-Karp, Professor of Environmental Health Sciences at the Johns Hopkins Bloomberg School of Public Health.