the Tudor House, North Hall, Findley Hall, Lang Hall and Ritter Library. Sustainability BW has been first in several areas in sustainability. In 2005, BW became the first to have a residence hall in Ohio with geo-thermal heating and cooling. Ernsthausen Hall which was originally built in 1961 was renovated in 2005 to use geo-thermal heating and cooling. In the fall of 2008, Baldwin Wallace became the first college in Ohio to offer a bachelor's degree in sustainability. The undergraduate program offers four tracks in science, social sciences/humanities, business administration and quantitative analysis. In the fall of 2009, BW became the first school in the state to install a wind turbine on its campus. BW also uses kitchen grease from Strosacker Hall's dining facilities for the production of bio-diesel fuel for campus vehicles. In 2012, BW opened Harding House which is a renovated residence hall to become a "sustainability house". The house has an "energy dashboard" that monitors energy consumption and a vegetative roof garden that absorbs rainwater that helps regulate the building's temperature. In addition, Harding House and the Center for Innovation and Growth both have solar panels on their roofs. 63 Beech, 21 Beech, Saylor and Klien Halls will eventually join Ernsthausen & Harding House to also include Geo-thermal heating and cooling. Student life The Strosacker Student Union houses the campus's largest dining facility, The Student Life Center (campus life offices), various administrative offices, student organization offices, meeting rooms, the Cyber Cafe and the campus bookstore. The Student Activity Center (SAC), renovated in the late 1990s, was the women's gym in the 1930s, and today is used for concerts and various student events. Housing There are two locations where students are housed. The first is north campus which encompasses halls north of Bagley Road. North campus includes Lang, Findley, North and Hamilton Apartments. The college acquired a former practice field and office building when the team was moved to Baltimore. Findley Hall and Lang Hall both house typically upperclassmen students, but North Hall usually houses first-year students. Lang Hall was the only all-female residence hall until 2008. South campus typically encompasses residence halls that are south of Bagley Road. Davidson Commons makes up the new freshman complex. 21 Beech is also home to Honors housing. Ernsthausen, Heritage, and Constitution typically house upperclassmen and Greek organizations. Greek organizations are housed in residence halls because there are no fraternity/sorority houses.