By Peter Senge
By Alastair H. Fitter (University of York, U.K.), Robert K.M. Hay (Scottish Agricultural Science Agency, EDINBURGH, Scotland)
By Martin Walters, Bob Gibbons, Kenny Taylor, Michael Wood, Stella Tranah
By William Sweet (IEEE Spectrum magazine)
By Echlin, Edward P.
By Diane Ackerman
By David Middleton
By Marguerite S. Shaffer, Phoebe S. K. Young
By Eugene Linden
By Richard. S. K. Barnes, etc., P. Calow (Professor of Zoology, University of Sheffield), P.J.W. Olive (Senior Lecturer in Zoology), M. Dove
By Richard T. Holmes, Gene E. Likens
By Michael J. Wade
By Brian H. Walker (Division of Wildlife and Ecology CSIRO, Australian Capital Territory), Will Steffen (Division of Wildlife and Ecology CSIRO
By Josep G. Canadell, Diane E. Pataki, Louis F. Pitelka
By Peter D. Tyson, Roland Fuchs, Congbin Fu, Louis Lebel, Hermine Vloemans
By T. M. Smith (University of Virginia), H. H. Shugart (University of Virginia), F. I. Woodward (University of Sheffield)
By Eric F. Lambin, Helmut J. Geist
By Great Britain: Department of the Environment, Transport and the Regions
By Lindsay Galvin
By Guy Shrubsole
By Hannah Ritchie
By Anita Ganeri
By M.A. Burgman, S. Ferson, H.R. Akcakaya
By Thomas Nowotny
By Ruth Merttens, Ba, Med, Dave Kirkby
By Llewellyn Vaughan-Lee (Llewellyn Vaughan-Lee )
By Satish Kumar, Rupert Sheldrake
By Mark Watson
By Barbara Kingsolver
By Helmut F. van Emden (University of Reading)