英文關鍵字
air
ash
atmosphere
black
burning
cloud
cloudy
coal
damage
dirty
discharge
emissions
environment
exhaust
field
fire
flame
flare
fuel
gas
generation
generator
global
grunge
heat
industrial
industry
nature
oil
pollute
polluting
pollution
rubber
silhouette
sky
smog
smoke
spewing
spews
stack
steam
supply
thermal
warm
wreck