The Sustainable Design curriculum offers three design-based and three scholarly programs that study the relationship between the built and natural environments. The program as a whole integrates three areas of inquiry related to the built environment — natural systems, building systems, and cultural systems. The study of natural systems relies upon the disciplines of physics and ecology as they relate to architecture. The study of building systems includes investigation of those component technologies that are required to construct environmentally responsive architecture. The study of cultural systems requires that natural and building systems be investigated within the complex social and political context of architectural practice. In sum, the Sustainable Design Program is practical, technical, and philosophical in scope.