More and more people are viewing the world through green-tinted glasses, and those ideas about making school and university facilities more environmentally friendly suddenly are appearing to be prudent and responsible. Among the groups that have been advocating for environmentally friendly school design for years are the Collaborative for High Performance Schools, whose "Best Practices Manual" for high-performance school construction has been adopted by the U.S. Department of Energy; and the U.S. Green Building Council (USGBC), whose Leadership in Energy and Environmental Design (LEED) certification has provided incentives for numerous education institutions to embrace green design strategies. The LEED rating system picked up additional momentum in 2007 when the USGBC established a rating system specifically for K-12 schools. As its name implies, LEED for Schools accounts for issues and conditions that are more critical in a K-12 setting, such as acoustics, mold prevention, and using the facility itself to teach. Rachel Gutter, school sector manager with the USGBC, says colleges and universities can seek LEED certification using either the New Construction or Schools rating system, but K-12 schools need to use the new LEED for Schools system.