Source: Bloomberg Business Week, August 17, 2011. Ranked fourth last year, UW took the top spot from second-ranked Green Mountain College in Poultney, VT. UW was helped by the survey’s emphasis on where schools get their energy and rewarding schools that don’t rely on coal. Hydropower provides 90% of the energy at UW. Additionally, all buildings built after 2006 have earned at least LEED Certified Gold, all new appliance purchases are Energy-Star rated, and recycling is ever-present.