英文關鍵字
air
atmosphere
chemical
chimney
city
clouds
co2
coal
danger
dioxide
dirty
earth
ecology
energy
environment
environmental
factory
fog
fumes
gas
global
hot
industrial
industry
landscape
manufacturing
nature
oil
pipe
pipes
plant
pollutes
pollution
power
red
refinery
risk
safety
sky
smog
smoke
smokestack
stack
station
steam
steel
sun
sunset
technology
tower
toxic
type
warming
waste
which