The designations employed and the presentation of material in this
information product do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations (FAO) concerning the legal or development status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. The mention of specific companies or products of manufacturers, whether or not these have been patented, does not imply that these have been endorsed or recommended by FAO in preference to others of a similar nature that are not mentioned.
The views expressed in this information product are those of the author(s) and do not necessarily reflect the views or policies of FAO.
ISBN 978-92-5-107595-1 (print)
E-ISBN 978-92-5-107596-8 (PDF)
FAO encourages the use, reproduction and dissemination of material in this
information product. Except where otherwise indicated, material may be
copied, downloaded and printed for private study, research and teaching
purposes, or for use in non-commercial products or services, provided that
appropriate acknowledgement of FAO as the source and copyright holder is
given and that FAO’s endorsement of users’ views, products or services is not
implied in any way.
All requests for translation and adaptation rights, and for resale and other
commercial use rights should be made via www.fao.org/contact-us/licencerequest
or addressed to [email protected].
FAO information products are available on the FAO website (www.fao.org/publications) and can be purchased through [email protected].