Since opening its Office of Sustainability in 2006, UF has made sweeping changes across campus to increase energy efficiency and conservation, reduce the use of fossil fuels, promote environmental preservation and much more. Today, the university has 56 LEED-certified green buildings; a heavily used bus and car-sharing system; a vibrant Community Supported Agriculture program; a recycling and reuse program that captures 38 percent of campus waste; and a sustainability studies major and minor. About a quarter of the food served in UF dining halls comes from local or organic sources, and the university is producing a small but increasing share of its own electricity using photovoltaics.