Three smoking stack pipes making clouds of white smoke.
Schlüsselwörter
air,
chimney,
ecology,
factory,
industrial,
industry,
pollution,
sky,
smoke,
atmosphere,
chemical,
climate,
energy,
environment,
gas,
global,
manufacturing,
pipe,
power,
steam,
technology,
warming,
production,
smog,
stack,
tower,
coal,
dioxide,
dirty,
environmental,
toxic,
blue,
building,
fuel,
white,
station,
fume,
vapour,
refinery,
exhaust,
pipe
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