英文關鍵字
built
chemical
chimney
evaporation
factory
fog
fumes
gas
industrial
industry
pipe
pipes
plant
pollution
power
sky
smog
smoke
smoking
station
steam
termal
the
tube
英文關鍵字
built
chemical
chimney
evaporation
factory
fog
fumes
gas
industrial
industry
pipe
pipes
plant
pollution
power
sky
smog
smoke
smoking
station
steam
termal
the
tube