Emory has a free shuttle bus service through campus and surrounding neighborhoods that is 100 percent alternatively-fueled, mainly on biofuel made from used cooking oil from the campus cafeterias and hospitals. Members of the campus community who take transit, bike, or walk to work may use university hybrid flex-cars for errands throughout the day, free of charge. Emory has a bike program of giveaways, incentives, a mobile bike repair station, and loaner bike fleets.