We have been awarded $394,638 by the Chemistry Division of the National Science Foundation for a three-year project titled, “Kinetic and Mechanistic Studies of Criegee Intermediate reactivity.” The project is part of the Environmental Chemical Sciences program. We will use laser flash photolysis and broadband transient absorption spectroscopy to measure temperature-dependent rate constants of Criegee intermediate reactions with trace atmospheric gases. Specifically, we will study Criegee intermediate reactions with multifunctional volatile organic compounds, radical species, and explore the influence of humidity on reactivity. A new outreach program will establish air quality and weather monitoring stations at local high schools.