英文關鍵字
air
architecture
atmosphere
boiler
building
chimney
cloud
coal
contamination
damage
danger
day
dioxide
electric
electricity
energy
environment
factory
fired
foggy
fossil
fuel
fumes
gas
global
industrial
industry
lighting
natural
people
plant
pollution
power
producing
real
sky
smog
smoke
smokestack
stack
station
steam
technology
time
tower
toxic
warming
winter