Examine the graph, which shows that world use of electricity for mining and refining virgin aluminum has increased since the 1950s. Given that the production of aluminum has become more...

Examine the graph, which shows that world use of electricity for mining and refining virgin aluminum has increased since the 1950s. Given that the production of aluminum has become more energyefficient in recent years, how do you account for the current global increase in electricity used in aluminum production?