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alumina
aluminium
aluminum
atmosphere
bauxite
chemical
chimney
climate
construction
containers
cooling
crane
danger
dioxide
dirty
ecology
economics
economy
emissions
energy
environment
environmental
equipment
exhaust
factory
industrial
industry
metal
mineral
ore
pipe
piping
plant
processing
product
production
refinery
refining
smog
smoke
stack
steam
storage
technology
urban
vapor
warming