英文關鍵字
air
blue
building
chemical
chimney
climate
cloud
coal
color
construction
copter
dirty
ecology
electricity
emissions
energy
environment
factory
fog
footprint
fuel
fumes
gas
global
heavy
industrial
industry
infrastructure
manufacturing
nature
pipe
plant
pollute
pollution
power
radioactive
sky
skyline
smog
smoke
smokestack
stack
station
steam
technology
tower
toxic
warming
white
winter