A U.S. Green Building Council partnership released its third annual report listing the greenest colleges nationwide. The online-only guide, available as a free download, includes brief summaries of sustainability initiatives at each of the top 311 schools, as well a dozen or so data points on things like renewable power use, energy efficiency and waste disposal.

"The statistics and summaries have plenty of interesting tidbits on the greenest schools," wrote the New York Times. "Who knew that 94 percent of the electricity used by Bates College, in Lewiston, Me., came from renewable sources? Or that 35 percent of the food served at Harvard is produced locally?"

18 colleges made the Honor Roll, receiving a Green Rating of 99 (the highest score) in the rating tallies this year: Arizona State University, (Tempe); College of the Atlantic (Bar Harbor, ME); The Evergreen State College (Olympia, WA); Georgia Institute of Technology (Atlanta); Harvard College (Cambridge); Northeastern University (Boston); Northland College (Ashland, WI); State University of New York at Binghamton; Unity College (Unity, ME); University of California–Berkeley; University of California–Santa Barbara; University of California–Santa Cruz; University of Georgia (Athens, GA); University of Maine (Orono); University of Maryland, College Park; Warren Wilson College (Asheville, NC); West Virginia University (Morgantown); Yale University (New Haven, CT). Read the detailed summary of those schools at PrinctonReview.com.

(READ more at the NY Times Green blog) – Click for full list of schools by state.