英文關鍵字
air
atmosphere
background
belching
black
bright
carbon
chimney
clean
closeup
dawn
detail
ecology
energy
environment
environmental
evening
factory
gas
global
industrial
industry
morning
pipe
plant
pollutant
pollution
power
powerplant
red
sharp
silhouette
sky
smoke
smokestack
soot
space
stack
station
sunlight
sunrise
sunset
toxic
tube
vapor
vintage
warming