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Stephen Pacala, former director of the Princeton Environmental Institute (PEI), provides a visual tour of the University's interdisciplinary center for environmental research, education and outreach. In this video Pacala discusses the Institute's mission, world-class faculty, interdisciplinary research and unique educational opportunities, including internships.

In 2007, PEI launched the Grand Challenges Program in collaboration with the School of Engineering and Applied Science and the Woodrow Wilson School of Public and International Affairs. Grand Challenges integrates research and teaching to address complex global environmental problems with scientific, technical, public policy, and human dimensions of global environmental problems.