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I think... you might want to read up on aluminum smelting, which converts alumina (Al2O3) into aluminum (Al). The process involves passing a large current betw

I think... you might want to read up on aluminum smelting, which converts alumina (Al2O3) into aluminum (Al). The process involves passing a large current between two graphite (carbon) electrodes via the alumina. Al2O3 + carbon => Al + CO2 Edit: I can only guess that the down votes are for not providing a source? Here you go: http://en.wikipedia.org/wiki/Aluminium_smelting http://en.wikipedia.org/wiki/Aluminium_smelting It doesn't matter if the smelter runs on fairy dust or hippie juice. Reducing aluminum oxide to aluminum produces CO2 no matter the energy source.

scotty79 12y ago
It seems that you can significantly reduce carbon emissions of aluminum smelting if you use energy source that does not emit carbon dioxide. From http://aluminium.org.au/climate-change/smelting-greenhouse-performance http://aluminium.org.au/climate-change/smelting-greenhouse-p... The smelting of aluminium is a very energy intensive process – and over 80 per cent of smelting greenhouse gas emissions are indirect (electricity-related) emissions. The remaining emissions come from direct (on-site) emissions plus the emissions associated with the production of alumina.
- abalone 12y ago
  That's true but the direct emissions are still very substantial. It only seems small in comparison because smelting uses so much electricity to begin with.