For five consecutive years, The Princeton Review has been researching issues of sustainability as they pertain to college.

In April, 2011, we partnered with the U.S. Green Building Council to produce The Princeton Review's Guide to 322 Green Colleges. And every year we publish our Green Ratings in The Best Colleges. The Princeton Review's third annual Green Rating evaluates colleges and universities on their environmentally related policies, practices and academic offerings. The result is a numerical score on a scale of 60–99. You will find each college's (806 of them) Green Rating on the Campus Life / Facilities tab of their profile.

We salute 21 schools for their commitment to sustainability.  These schools received our highest Green Rating of 99 and a place on The Princeton Review's Green Honor Roll.