英文關鍵字
air
architecture
blue
building
business
chemical
chimney
climate
cloud
coal
color
day
dirty
ecology
electric
emissions
energy
environment
factory
fuel
gas
global
heat
heavy
industrial
industry
infrastructure
landscape
large
nature
oil
pipe
plant
pollution
power
refinery
sky
smog
smoke
smokestack
stack
station
steam
technology
tower
toxic
vapor
warming
waste
white