CHARLES HALL,^* DIETMAR LINDENBERGER,^** REINER KÜMMEL,^*** TIMM KROEGER,^**** WOLFGANG EICHHORN<sup>*****


*</sup>Charles Hall (chall@esf.edu) is a professor in the department of Environmental and Forest Biology and in the Program of Environmental Studies, College of Environmental Science and Forestry, State University of New York, Syracuse, NY 13210; also at SUNY
^**Dietmar Lindenberger is senior researcher at the Institute of Energy Economics, University of Cologne, Albertus-Magnus-Platz, D-50923 Cologne, Germany.
^***Reiner Kümmel is a professor of physics at the Institute of Theoretical Physics, University of Würzburg, D-97074 Würzburg, Germany.
^****Timm Kroeger is a graduate student in the department of Environmental and Forest Biology and in the Program of Environmental Studies at the College of Environmental Science and Forestry.
^*****Wolfgang Eichhorn is a professor of economics at the Institute of Economic Theory and Operations Research, University of Karlsruhe, D-76128 Karlsruhe, Germany. © American Institute of Biological Sciences.