英文關鍵字
air
architecture
atmosphere
blue
building
chemical
chimney
cityscape
clouds
coal
construction
dirty
ecology
electric
electrical
electricity
energy
environment
environmental
equipment
evening
exhaust
factory
fuel
gas
heavy
industrial
industry
manufacturing
oil
petroleum
pipe
plant
pollution
power
production
sky
smog
smoke
stack
station
steam
steel
supply
technology
tower
toxic
warming