Since 1950, meat consumption has doubled among the world's richest 20%, whereas the world's poorest quintile has not increased its consumption of meat much at all.
Source: Heap B, Kent J, eds. Toward Sustainable Consumption: European Perspective. London:The Royal Society, 2000. Also available: http://www.royalsoc.ac.uk/policy/sustain/!fullsustainreport.PDF [cited 27 February 2002].