<html> <body> Hi all: Many thanks to all of you for the excellent suggestions: links, attachments, and references.  I am very grateful. I (obviously) haven't had much time to pore over the information I received, but I do have one outstanding concern.  Second year students are accustomed to a course format where each week a topic is introduced, quantitative methods for addressing the problem are described, and an assignment is given.  I wonder how much is available in terms of "technical methods" for assessing "sustainability" in terms of, say, air quality, water quality, land consumption, etc. This weekend, I intend to spend a great deal of time processing your suggestions and developing both a set of reference materials and a detailed course syllabus.  I imagine that there will be some sufficiently large holes to fill, so I may be seeking more ideas. Thanks again to all. Jeff </body> </html>