Thirty-seven products were labelled to indicate embodied carbon emissions, and sales were recorded over a 3-month period. Green (below average), yellow (near average), and black (above average) footprints indicated carbon emissions embodied in groceries. The overall change in purchasing pattern was small, with black-labelled sales decreasing 6% and green-labelled sales increasing 4% after labelling. However, when green-labelled products were also the cheapest, the shift was more substantial, with a 20% switch from black- to green-label sales. These findings illustrate the potential for labelling to stimulate reductions in carbon emissions.
Post-print of: Vanclay, JK, Shortiss, J, Aulsebrook, S, Gillespie, AM, Howell, BC, Johanni, R, Maher, MJ, Mitchell, KM, Stewart, MD & Yates, J 2011, 'Customer response to carbon labelling of groceries', Journal of Consumer Policy: Special issue on Putting Sustainable Consumption into Practice.
The original online publication is available at www.springerlink.com, http://dx.doi.org/10.1007/s10603-010-9140-7