Managing Change: Sustainable Approaches to the Conservation of the Built EnvironmentEdited by Jeanne Marie Teutonico and Frank Matero Since the 1970s sustainability has evolved as a significant mode of thought in nearly every field of intellectual activity. In 1992 the United Nations Conference on Environment and Development in Rio de Janeiro brought the ideas of sustainability and development to the forefront of global politics. For historic resourceswhether a cultural landscape, town, building, or work of artwhich cannot be