The University committed to a campus-wide effort to reduce energy use by 15 percent by 2007. Motion sensors and efficient lighting fixtures installed in the library, which had previously been the largest consumer of electricity on campus, have reduced energy consumption by 30 percent. An energy audit of buildings across campus was conducted by a team of experts in January 2006, looking for short,- medium-, and long-term energy saving strategies. Retrofits of HVAC systems, windows, lighting, and roofing material have also contributed to energy savings.