英文關鍵字
aerial
air
aluminum
atmosphere
carbon
change
chemical
chemicals
chimney
chimneys
co2
dioxide
dirty
dust
ecology
electricity
emission
emissions
energy
environment
factories
factory
fossil
fuel
fumes
heat
industrial
industry
manufacturing
ozone
pipe
pipes
plant
polluted
polluting
pollution
power
refinery
sky
smog
smoke
smokestacks
stacks
station
steel
technology
tower
toxic
warming