Fig. 4.

Results of seven LCA studies reporting the greenhouse gas emissions per tonne of food waste. The location of and waste stream evaluated in each study (Hh = household, Ca = catering, Re = retail, and Ma = manufacturing food waste) are listed. Crosses are marked where a study did not include a technology in their analysis. Where a study reported emissions for multiple food waste types (e.g. meat or banana wastes from supermarkets), the mean emissions are shown. Two further LCA studies (Ogino et al., 2012, Tufvesson et al., 2013) use different functional units (reporting results per kg of animal feed and per MJ of fuel energy, rather than per tonne of food waste) and so cannot be displayed for comparison. AD = anaerobic digestion.