Radio Joe attended the 1.5 day Workshop on the Health Risks of Indoor Exposure to Particulate Matter at the The National Academies of Sciences, Engineering and Medicine. The workshop was a who's who of indoor air quality researchers, regulators, stakeholders, industry leaders and others. It was held at the National Academies building in DC and was sponsored by EPA. Over 400 people watched the webinar live and learned more than they ever thought was possible about particulate matter, indoor air quality and health effets. Radio Joe will summarize the key points from 1.5 day program in a one hour program today. LEARN MORE on what we know and what we still need to learn about how particulate matter affects health this week on IAQ Radio.