Designated a platinum-level “Bicycle Friendly University,” this famous California school has about 13,000 bikes on campus every day, 12 miles of bike lanes and 18,000 bike parking spaces. In addition, the school has a free bus system powered by electric, biodiesel and diesel-electric hybrids. Stanford's energy plan is set to reduce campus greenhouse emissions by 50 percent and decrease potable water use by 15 percent by the end of 2015. Energy retrofits save more than 46 million kilowatt-hours of electricity per year and the campus has had a 23 percent reduction in domestic water use since 2001. About 40 percent of campus food is sustainably sourced from local farms and manufacturers or is third-party certified. The recycling program diverts 64 percent of waste from landfills.