By Conroy, Czech, Litvinoff, Miles
By Han Suyin, Suyin, Han, Hussein, Aamer
By Brown, Lester R., Kane, Hal
By Dresner, Simon
By International Union for the Conservation of Nature
By Ince, Martin
By Grubb, Michael, etc.
By German, Tony, Randel, Judith
By Vaux, Tony
By Mackay, Richard
By Clarke, Robin
By Calder, Ian R.
By Boserup, Ester, Mitter, Swasti
By Wisner, Ben
By Paul Hawken, Amory B. Lovins, L. Hunter Lovins
By Urdang, Stephanie
By Marc Lappe, Britt Bailey, Tim Lang (Professor of Food Policy, Thames Valley University)
By Berkeley Hill (Imperial College, University of London, UK)
By Ernst Ulrich von Weizsacker, Oran R. Young (University of California Santa Barbara, USA), Matthias Finger, Marianne Beisheim
By Gwyn Prins, Robert Stamp
By William M. Adams
By Stephen Bass, Barry Dalal-Clayton
By Michael Edwards
By miles litvinoff
By Dow, Professor Kirstin, Downing, Thomas E.
By Dankelman, Irene, Davidson, Joan
By Barry Munslow, etc., et al
By Bennett, Graham