Agroecological farms emit between about one half and one third the GHG emissions of industrial farms
Paraphrase: Farms with agroecological practices emit about half to as little as about a third as many greenhouse gas emissions as farms using chemical inputs.
Source:UN Food and Agriculture Organization, “Organic Agriculture and Climate Change,” 2005, http://www.fao.org/DOCREP/005/Y4137E/y4137e02b.htm [verified 4/25/14]