英文關鍵字
evening
twilight
darkness
plant
factory
sky
industry
smoke
global
pollution
environment
air
power
industrial
smog
environmental
chemical
steam
damage
energy
fumes
refinery
chimney
tower
exterior
building
city
pollute
work
place
structure
outdoor
fog
business
manufacture
outside
urban
summer
smokestack
exhaust
tube
stack
enterprise
manufactory
undertaking
department