New Haven, Connecticut
In 2005, Yale committed to reducing its carbon dioxide emissions 43% by 2020. The campus now has 14 LEED buildings, including the Platinum-certified School of Forestry and Environmental Studies. Above, students sort through items at the university's annual "spring salvage" event, which reclaims stuff that would otherwise get thrown out at the end of the academic year.
Photo courtesy of Michael Marsland/Yale University