I am interested in how chemical contaminants move and transform in the environment, especially in realistic environments with potential for environmental and human exposure respectively. My current research focuses on the chemical kinetics and transformation products of indirect photochemistry of heterocyclic pharmaceuticals in natural waterways and heterogeneous oxidation of plasticizers and other common contaminants indoors. Using high-resolution mass spectrometry, the many reaction products produced by these systems can be characterized, providing insight into the ‘explosion’ of chemical complexity introduced by environmental transformations of contaminants. These results can help inform risk assessment of present-day contaminants and inform chemists working on the next generation of environmentally friendly chemical products.