air
blue
building
business
chemical
chemistry
chimney
construction
dusk
ecology
energy
engineering
environment
equipment
factory
foundry
furnace
gas
heavy
industrial
industry
iron
light
manufacture
manufacturing
metal
metallurgical
metallurgy
night
petrochemical
pipe
pipes
plant
pollutant
pollution
power
production
sky
smog
smoke
smokestack
stack
station
steam
steel
sunset
technology
tube
twilight
works
定額
Metallurgical plant with white smoke at night. Steel factory with smokestacks . Steelworks, iron works. Heavy industry. Air pollution from smokestacks, ecology problems. Industrial landscape at twilightの素材 [FY31061934181]
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