16% of world's calories come from livestock
“The livestock sector accounts for 40% of the value of world agricultural output and provides 16% of total food calories and 31% of dietary protein.” (PAGE 1)
J.M. Pedersen, FAO Representative to the European Union and Belgium, Public/Private Partnerships in Animal Agriculture to Strengthen World Food Security Keynote, 50th Anniversary of FEFAC (9 September, 2009).http://www.fefac.eu/file.pdf?FileID=22193&CacheMode=Fresh