英文關鍵字
air
architecture
atmosphere
background
building
chimney
construction
dirty
ecology
environment
equipment
evening
exhaust
factory
fuel
gas
heavy
high
industrial
industry
manufacturing
oil
people
petroleum
pipe
plant
pollution
power
production
red
sky
smog
smoke
stack
station
steam
steel
supply
technology
texture
thick
tower
toxic
warming
white