Exposure to benzene, an air pollutant found in sources like gasoline, cigarette smoke, and many industrial emissions, is associated with adverse health effects including cancer and anemia. However, benzene is not currently measured in a way that assesses people’s exposure levels in their environment, homes and workplaces in real-time. This project will develop a real-time benzene sensor using laser technology and deploy it to measure the concentrations and sources of benzene across California. By successfully deploying and eventually commercializing these sensors, the project will identify and help reduce key sources of benzene in the environment.