Figure 4
The chart is titled “Transport comparison - environmental impact per ton asterisk kilometer”. The horizontal axis lists four categories in left-to-right order: “global warming (kilogram carbon dioxide equivalent per ton asterisk kilometer)”, “eutrophication (gram phosphate equivalent per ton asterisk kilometer)”, “photochemical oxidation (gram acetylene equivalent per ton asterisk kilometer)”, and “acidification (gram sulphur dioxide equivalent per ton asterisk kilometer)”. The vertical axis ranges from 0 to 0.9 in increments of 0.1. There are eight bars in total, with two bars per category representing “Non-refrigerated lorry” and “Refrigerated lorry”. Values for “Non-refrigerated lorry”: global warming: 0.21. eutrophication: 0.16. photochemical oxidation: 0.03. acidification: 0.68. Values for “Refrigerated lorry”: global warming: 0.28. eutrophication: 0.20. photochemical oxidation: 0.04. acidification: 0.80 Note: All numerical values are approximate.Comparison between transport modes to parity of mileage