In National Rankings The following year, "The Princeton Review's Guide to 322 Green Colleges, 2012 Edition", listed UNT for the second consecutive year, citing its top 17-percent ranking among green-compliant universities nationwide under ACUPCC. The article stated that forty percent of the energy on campus is derived from renewable sources, and 43 percent of the buildings have undergone energy retrofits. The campus has posted strong numbers in recycling: since 2009, the university has recycled nearly 1,000 tons of waste materials. UNT offers graduate degrees in Environmental Science and Public Administration and Management.