The opinions expressed in the papers are those of the authors,
who can be contacted as follows:
Henning Steinfeld
(Henning.Steinfeld@fao.org)
Achilles Costales
(Achilles.Costales@fao.org)
Jonathan Rushton
(rushtonjonathan@yahoo.com)
Beate Scherf (Beate.Scherf@fao.org)
Tony
Bennett (Anthony.Bennett@fao.org)
David Hall
(davidhallfao@yahoo.com)
Photograph:
Cover: R. Lemoyne
