By Cameron Dunn, Sue Warn
By Alastair Fothergill, Keith Scholey, Fred Pearce, David Attenborough
By Jayne Buxton
By Scott Weidensaul
By Food and Agriculture Organization of the United Nations
By Katherine Rundell, Talya Baldwin
By William Alvis Brogden
By Adriana Petryna
By Rob Jackson
By Mariano Turzi
By Piers M. Blaikie, Harold Brookfield
By Bassey, Nnimmo
By Matthew T. Huber
By Per Espen Stoknes, Paul Hawken
By Jeff Goodell
By Martha C. Nussbaum
By Henning Steinfeld, Food and Agriculture Organization
By Wayne Visser
By John Vaillant
By Scoffham, Stephen, Bridge, Colin, Jewson, Terry
By Organization for Economic Co-operation and Development
By Dr. Brian Thill (Golden West College, USA)
By Roy Dennis
By Wensell, Ulises, Steel, Anne
By Ian Gough
By Andrew Solway
By Michael Cahill
By Erling Holden, Kristin Linnerud, David Banister, Valeria Schwanitz, August Wierling
By Jeremy Purseglove, Tony Soper