The land/sea area conversion factor estimates that on average one litre of fuel
produces about 0.035 gigajoule (GJ)/L: [1 (L) 0.035 GJ/L]/[100 GJ/
ha/year] ¼0.00035 ha/year. Finally, the ecological footprint (EF) of
road transport may be estimated by the expression (Chi & Sto