Ernst Ulrich von Weizsäcker was founder and president of the Wuppertal Institute. He was member of the German Federal Parliament from 1998 until 2005. He is co-author of the books Factor Four and Factor Five. He was decan at the Bren School of Environmental Science and Management, University of California, Santa Barbara until 2008.

German Title: Plädoyer für eine ökologische Steuerreform