Oklahoma universities earn average grades for sustainability

Oklahoma State University: Buses are the only types of vehicles allowed on OSU's interior campus streets during weekdays. The university has a bike-sharing program and offers free public transportation for students, staff and faculty. About 85 percent of buildings have an energy management system to monitor energy use.

University of Oklahoma: About 15 percent of OU's annual food budget is spent on local products. OU donates extra food to local shelters. The university signed a contract with Oklahoma Gas and Electric Co. to buy 100 percent of its electricity from renewable energy sources by 2013. More than one-third of campus vehicles use alternative fuel sources.

University of Tulsa: Tulsa has a bike-sharing program with about 350 bikes and a free shuttle service that is fueled by natural gas. Six student interns work on sustainable efforts each semester. About 5 percent of the university's food budget is spent on local items. The university is exploring ways to invest in renewable energy funds.