英文關鍵字
air
architecture
background
blue
chemical
chimney
city
climate
coal
day
dirty
dust
ecology
emissions
energy
environment
factory
fog
footprint
fuel
gas
global
heat
industrial
industry
infrastructure
manufacturing
nuclear
pipe
plant
pollute
pollution
power
production
sky
skyline
smog
smoke
smokestack
spewing
stack
station
steam
technology
tower
toxic
warming
waste
white
winter