英文關鍵字
aerial
air
architecture
atmosphere
background
blue
building
business
chemical
chimney
climate
cloud
coal
construction
copter
dioxide
dirty
ecology
electrical
electricity
emissions
energy
environment
environmental
exhaust
factory
fuel
gas
global
industrial
industry
large
pipe
plant
pollute
pollution
power
sky
smog
smoke
spewing
stack
station
steam
technology
tower
toxic
warming
waste
white