Indoor air is a complex soup of molecules that is constantly changing, not only because of new sources (cooking, cleaning, personal care products), but also because of chemical reactions taking place on material surfaces and in the air. We will be discussing results from the House Observations of Microbial and Environmental Chemistry (HOMEChem) – and what they tell us about indoor air quality–just in time for your Thanksgiving dinner cooking sprees! Dr. Delphine Farmer is an Associate Professor of Chemistry at Colorado State University in Fort Collins, CO. She received her BS in Chemistry at McGill University, a MS in Environmental Science, Policy and Management from UC Berkeley, and her PhD in Chemistry from UC Berkeley. While her interests have mainly focused on the outdoor atmosphere and how forests interact with air pollution, she has recently dived into the world of indoor air. She is a co-leader of the HOMEChem study and the forthcoming CASA (Chemical Assessment of Surfaces and Air) Study, which is focused on the interactions between indoor and outdoor air pollution.