Climate change has brought the greenhouse gas (GHG) emissions of aluminum smelting into sharp focus. Other important sustainability issues include bauxite residue dam integrity, waste disposal (spent potling, dross, etc.), water consumption, working conditions, biodiversity, etc. In this article, past work to reduce GHG emissions is examined together with latest trends within the industry around "green" low CO_2e aluminum marketing and certification. The prospects for renewable energy replacement of fossil fuel power by solar generated water splitting to obtain hydrogen are discussed in the context of the Australian energy policy.
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