英文關鍵字
air
atmosphere
blue
burn
carbon
change
chimney
climate
co2
coming
concept
contamination
damage
dark
death
dioxide
dirty
ecology
emission
energy
environment
environmental
exhaust
flue
fuel
gas
global
heating
industrial
industry
landscape
manufacturing
ozone
pipe
place
plant
pollutants
pollution
power
problems
sky
smog
smoke
smokestack
stack
steam
technology
toxic
warming
white
work