77 million tonnes of plant protein are consumed annually to produce 58 million tonnes of animal prot
"Livestock products supply around 12.9 percent of calories consumed worldwide (FAO, 2009b) and 20.3 percent in developed countries. Even more important, perhaps, is their contribution to protein consumption, estimated at 27.9 percent worldwide and 47.8 percent in developed countries." (13) ------------------------------------ Today, about half the world’s production of grain is fed to animals, especially monogastrics (IAASTD, 2009), and 77 million tonnes of plant protein are fed to livestock to produce 58 million tonnes of animal protein (Steinfeld et al., 2006), contributing 13% of the energy to the world’s diet. Feed crops occupy an estimated one-half a billion hectares of land; including grazing land, livestock accounts for four-fifths of all agricultural land (Steinfeld et al. (2010)
"World Livestock 2011: Livestock in food security," FAO, 2011. http://www.fao.org/docrep/014/i2373e/i2373e.pdf ----------- Quote from: Smith, Jimmy, "Beyond milk, meat, and eggs: Role of livestock in food and nutrition security," International Livestock Research Institute, January 2013, Vol. 3, No. 1. http://www.animalfrontiers.org/content/3/1/6.full.pdf Sources cited: IAASTD. 2009. International Assessment of Agricultural Knowledge, Science, and Technology for Development Global Report. Island Press, Washington, DC. Steinfeld, "Livestock’s long shadow: Environmental issues and options," FAO, 2006. ftp://ftp.fao.org/docrep/fao/010/a0701e/a0701e00.pdf Steinfeld, "Livestock in a changing landscape. Volume 1. Drivers, consequences, and responses," Washington, D.C: Island Pres, 2010. http://cgspace.cgiar.org/handle/10568/16403