08/28/2009 05:12 am ET Updated May 25, 2011

Top 15 Greenest Colleges

The colleges were among 697 institutions that The Princeton Review included in their green ratings system. The green ratings were determined by using a university's sustainability policies, eco-friendly practices and eco-minded academic programs. In order to make the honor roll, schools had to score 99 points, which is the maximum available.

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