Four UC campuses are among Sierra magazine's Top 10 Greenest Colleges in America for 2011, highlighting the University of California's commitment to sustainability.

UC San Diego was third, UC Irvine sixth, UC Santa Cruz seventh and UC Davis eighth on Sierra Magazine's fifth annual rankings. Also making the list were UCLA at No. 15 and UC Santa Barbara at No. 72.

UC San Diego jumped to third from 15th in last year's rankings by Sierra magazine, the flagship publication of the Sierra Club, one of the nation's most influential environmental organizations. The campus was recognized for environmental practices, green initiatives and its caliber of sustainability-oriented education.

"Being green is part of our institutional DNA," said UC San Diego Chancellor Marye Anne Fox. "This ranking reflects the commitment, planning and hard work of our students, faculty and staff to implement sustainable solutions which will create a better future for us all."

See the full Sierra rankings.