英文關鍵字
aerial
air
atmosphere
bird
burning
chimney
city
cityscape
climate
concept
dirty
drone
dusk
ecology
emission
emit
energy
environment
environmental
eye
factory
flying
fuel
gases
global
industrial
industry
landscape
morning
pipe
pollute
pollution
power
production
refinery
sky
smog
smoke
smokestack
smoking
steam
sun
sunlight
sunrise
sunset
technology
top
toxic
twilight
urban
vapor
warming