Comments on: Sierra Club rates green schools Global environmental challenges Wed, 16 Nov 2016 08:14:55 +0000 hourly 1 By: lorboy Sat, 04 Sep 2010 01:06:07 +0000 Since many college campuses have much larger populations than your average American town and are instrumental in shaping the habits & opinions of our youth, they have an obligation on so many levels to be as green as possible.