Maybe 14 kWh/kg is just the electricity used in the refining process. Maybe to get the 63 kWh/kg figure, you add to the 14 kWh/kg figure the energy needed to c

Maybe 14 kWh/kg is just the electricity used in the refining process. Maybe to get the 63 kWh/kg figure, you add to the 14 kWh/kg figure the energy needed to collect the cans (if recycled) and to mine the aluminum (if not) and the energy needed to build the refining or recyling plant and the energy used by the workers who mine, collect and operate the refining and recycling plants, including the energy used to feed, clothe, educate, entertain, transport, etc, the workers. In other words, maybe one figure attempts to estimate the second- and third-order energy use, i.e., the "total carbon footprint", and the other does not.