Even if we have answers for the basic questions raised by the problem of sustainability there are still many approaches to determining a proper course of action. The viewpoints of LCA, the "ecological footprint", and "Natural Capitalism" each provide a standard against which to measure any particular program of change or development. We are presently challenged to make policy judgments of vital importance, to develop technologies and systems that increase sustainability, and to design and present these things in ways that ensure widespread adoption. In this course we will employ several case studies to examine these difficult issues. Emphasis will be placed on understanding underlying scientific principles, evaluating evidence available from the technical and scientific literature, and developing innovative approaches and solutions.