煙突から出る煙（環境問題）
Schlüsselwörter
chimney,
smoke,
pollution,
industry,
factory,
sky,
drone,
industrial,
surrounding,
power,
vapour,
smog,
tuneful,
plant,
ecology,
blue,
energy,
global,
heap,
tower,
excite,
white,
environmental issue,
air pollution
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