There are other forms of carbon-neutral electricity—hydroelectric, solar, wind, tidal, nuclear; you can even capture carbon emissions from natural gas plants if there was a hard requirement to. Since we have to solve that problem anyway it’s a separate problem.
Also, aluminum and bauxite can be shipped to/from where it makes the most sense to process it.
That's a bad response when any comment could easily link to a relevant white paper. GP, MIT+INL had a nice report in 2006[1] covering a lot about that and the resource potential. The GeoVision[2] report and data from DOE is also a good and more recent project.
