英文關鍵字
air
black
burning
carbon
chimney
cloud
cold
dioxide
dirty
exhaust
fuel
fumes
heating
industry
pipe
pollution
power
season
sky
smog
smoke
soot
stack
stove
the
winter
英文關鍵字
air
black
burning
carbon
chimney
cloud
cold
dioxide
dirty
exhaust
fuel
fumes
heating
industry
pipe
pollution
power
season
sky
smog
smoke
soot
stack
stove
the
winter