1. R. W. Kates, 33 Popple Point, Trenton, ME 04605, USA.
2. W. C. Clark and N. M. Dickson, Kennedy School of Government, Harvard University, Cambridge, MA 02138, USA.
3. R. Corell, American Meteorological Society, Washington, DC 20005, USA.
4. J. M. Hall, National Oceanic and Atmospheric Administration, Silver Spring, MD 20910, USA.
5. C. C. Jaeger and H. J. Schellnhuber, Potsdam Institute for Climate Impact Research, Potsdam D-14412, Germany.
6. I. Lowe, Griffith University, Nathan 4111, Australia.
7. J. J. McCarthy, Harvard University, Cambridge, MA 02138, USA.
8. B. Bolin, Stockholm University, Stockholm S-18451, Sweden.
9. S. Faucheux, Centre d'Economie et d'éthique pour l'Environment et le Développement, Université de Versailles, Guyancourt 78047, France.
10. G. C. Gallopin, Economic Commission for Latin America and the Caribbean, Santiago, Chile.
11. A. Grübler, International Institute for Applied Systems Analysis, Vienna A-2361, Austria.
12. B. Huntley, National Botanical Institute, Cape Town 7735, South Africa.
13. J. Jäger, International Human Dimension Programme on Global Environmental Change, Bonn D-53113, Germany.
14. N. S. Jodha, International Centre for Integrated Mountain Development, Katmandu, Nepal.
15. R. E. Kasperson, Stockholm Environment Institute, Stockholm 103 14, Sweden.
16. A. Mabogunje, Development Policy Centre, Ibadan, Nigeria.
17. P. Matson and H. Mooney, Stanford University, Stanford, CA 94305, USA.
18. B. Moore III, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824, USA.
19. T. O'Riordan, Centre for Social and Economic Research on the Global Environment, University of East Anglia, Norwich NR4 7TJ, UK.
20. U. Svedin, Swedish Council for Planning and Coordination of Research (FRN), Stockholm S-10387, Sweden.