Buildings on ASU's campus that utilize solar energy include the Varsity Gym, Plemmons Student Union, Raley Hall, and Kerr Scott Hall. Kerr Scott Hall also has the first green roof on campus. The green roof works to conserve energy by providing shade and removing heat from the air through evapotranspiration.[37] Appalachian Food Services is working to reduce food waste on campus by sending pre- and post-consumer food waste to a composting facility whose compost is used by Appalachian's Landscape Services as fertilizers.[38] The AppalCART is a no-cost public transit service that services the campus and surrounding Boone community.