Extracting aluminium from the bauxite
Loss of landscape due to the size of the chemical plant needed, and in the production and transport of the electricity.
Noise.
Atmospheric pollution from the various stages of extraction. For example: carbon dioxide from the burning of the anodes (greenhouse effect); carbon monoxide (poisonous); fluorine (and fluorine compounds) lost from the cryolite during the electrolysis process (poisonous).
Pollution caused by power generation (varying depending on how the electricity is generated.)
Disposal of red mud into unsightly lagoons.
Transport of the finished aluminium.
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