Turning bauxite into aluminum is an electrical process (they don't run on direct heat, steam, or mechanical power) and they use a lot of electricity (one reason

Turning bauxite into aluminum is an electrical process (they don't run on direct heat, steam, or mechanical power) and they use a lot of electricity (one reason aluminum-can recycling is such a big deal). Aluminum plants tend to end up in places with cheap electricity (especially hydroelectric) where they can absorb a lot of off-peak capacity as the power customer of last resort.