the university's grade on the College Sustainability Report Card 2009 improved from a "C" to a "B" according to the Sustainable Endowments Institute. Since 2008, following an executive order that all new state buildings over 15,000 sq ft (1,400 m2) must meet LEED silver at minimum, all new construction on campus has been registered for LEED status. So far, an expansion of Castetter Hall and the Technology and Education Center are the only LEED-certified buildings on campus, with a Gold and Platinum rating respectively. Several other buildings are currently registered for LEED status.
=== Libraries ===
The primary UNM library units are the Health Sciences Library and Informatics Center, the Law Library, and the University Libraries, which consists of:
Centennial Science and Engineering Library
Center for Southwest Research (special collections and archives—housed in Zimmerman Library)
Fine Arts and Design Library
Parish Memorial Business and Economics Library
Zimmerman Library (for humanities and social sciences)
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