The Princeton Environmental Institute (PEI) coordinates environmental education, research and outreach activities at Princeton University. Its more than 65 associated faculty members in the natural sciences, engineering, social sciences and humanities share a common interest in advancing environmental research and teaching and promoting environmental programs on campus and in the surrounding community. The undergraduate Program in Environmental Studies (ENV) offers a Certificate in Environmental Studies to students from all departments. PEI also administers graduate and postdoctoral training and fellowship programs. To make the results of Princeton scholarly research available and useful outside of academia, PEI organizes outreach activities for teachers, school children, private sector leaders, policymakers and the general public.

PEI’s interdisciplinary research program is currently focused chiefly in the sciences, with particular strengths in global change, biogeochemical cycles, molecular geochemistry, biodiversity and conservation, and environmental science and policy. It is organized principally through its four centers: the Carbon Mitigation Initiative, the Princeton Climate Center, a unit of the Cooperative Institute for Climate Science, the Center for Environmental BioInorganic Chemistry, and the Center for Biocomplexity.