Are gasoline and hybrid vehicles as clean as we think? Join us at the College of Engineering-Center for Environmental Research and Technology (CE-CERT) for a technical seminar featuring Dr. Susumu Sato from the Institute of Science Tokyo. While three-way catalysts are designed to purify exhaust, they often unintentionally produce Ammonia (NH3), a significant contributor to local roadside pollution and PM2.5. Dr. Sato will dive into his latest on-road testing research, comparing how different engine behaviors in conventional and hybrid vehicles impact real-world air quality. This session provides a critical look at the evolving chemistry of vehicle emissions and offers essential insights for anyone working toward a cleaner, more breathable urban environment.