For those interested in the subject: Ernst Weizsäcker, former Dean of the Donald Bren School for Environmental Science and Management at the University of Calif

For those interested in the subject: Ernst Weizsäcker, former Dean of the Donald Bren School for Environmental Science and Management at the University of California, has some interesting articles on resource productivity on his website: http://ernst.weizsaecker.de/ http://ernst.weizsaecker.de/