Jim VanDerslice, PhD is a Professor in the Division of Public Health at the University of Utah. His research focuses on evaluating human exposures to chemical and microbiological hazards in the environment. Several of his studies have examined contaminants in drinking water and foods, and their effects on infants and children. He utilizes Geographic Information Systems (GIS) as a tool to assess spatial patterns in exposures. He has recently become interested in the effects of the built environment on physical activity and obesity, and is using GIS to classify the built environment of SLC neighborhoods using spatial data and aerial imagery.