Over the past several decades, chemical pollution has posed a serious threat to the environment. Cornell undergraduate Elizabeth Liput ‘13, and others are investigating this pollution from an ecological standpoint, and more specifically, studying the effects of chemical pollutants on the reproductive behaviors of birds.A biological sciences major with a concentration in ecology and evolutionary biology, Liput has been working with a graduate student in the department of ecology and evolutionary biology, studying these effects from the field and in the lab.