recovered would be 15 tons. The production of virgin metals requires
8.9 MJ/kg (Table 5). Therefore the energy required to produce
15 tons of virgin metal is 15,000 kg 8.9 MJ/kg = 1.34 105
MJ. Recycling the metals results in energy savings of up to 60%.
Thus, the production of recycled metals would result in an energy
savings of 1.34 105 MJ 0.60 = 7.9 104 MJ of energy. The same
procedure was applied in determining the savings obtainable for
all the materials considered in the scenario and the results
aggregated.