英文關鍵字
air
chimney
company
conservation
environmental
exhaust
factory
fumes
gases
giant
global
greenhouse
industrial
industry
large
manufacturer
manufacturing
morning
pollution
silhouette
smog
smoke
stack
sunlight
warming
英文關鍵字
air
chimney
company
conservation
environmental
exhaust
factory
fumes
gases
giant
global
greenhouse
industrial
industry
large
manufacturer
manufacturing
morning
pollution
silhouette
smog
smoke
stack
sunlight
warming