Food production and consumption accounts for up to 29% of GHG emissions
“Food systems contribute 19%–29% of global anthropogenic greenhouse gas (GHG) emissions, releasing 9,800–16,900 megatonnes of carbon dioxide equivalent (MtCO2e) in 2008."Sonja J. Vermeulen, Bruce M. Campbell, and John S.I. Ingram, “Climate Change and Food Systems,”Annual Review of Environment and Resources 37, (2012): 195, accessed December 12, 2014, DOI: 10.1146/annurev-environ-020411-130608.