英文關鍵字
factory
smoke
industry
plant
building
power
energy
pollution
chimney
chemical
gas
oil
environment
refinery
production
pipe
electricity
construction
station
fuel
technology
air
nuclear
coal
smog
city
silhouette
manufacturing
tower
carbon
landscape
black
sky
steam
steel
ecology
global
environmental
heavy
structure
dirty
stack
atmosphere
cloud
co2
warming
exhaust
fumes
emission
fire