英文關鍵字
air
ashes
background
black
blue
burning
chimney
day
dirt
disaster
environment
fire
impure
industrial
industry
natural
pollution
sky
smoke
spread
sunny
toxic
toxin
英文關鍵字
air
ashes
background
black
blue
burning
chimney
day
dirt
disaster
environment
fire
impure
industrial
industry
natural
pollution
sky
smoke
spread
sunny
toxic
toxin