Duke's Nicholas School of the Environment is one of the world's premier graduate and professional schools for the interdisciplinary study of the environment. It exemplifies Duke's commitment to environmental stewardship and sustainability, which extends across the entire institution. All new construction and renovation at Duke is LEED certified, at a minimum, and the university seeks to achieve carbon neutrality by 2024. Initiatives such as the Green Devil Challenge, the Sustainable Duke Pledge and the Duke Individual Carbon Calculator are among the many other ways Duke is working to "Bleed Blue. Live Green."