英文關鍵字
america
barb
barbwire
carbon
chain
closed
closeup
dioxide
dirty
environment
environmental
factories
factory
fence
fencing
fuel
gas
global
hazard
industrial
industry
keep
large
link
manufacturer
manufacturing
methane
oil
outside
partially
petroleum
phase
pipes
plant
pollute
polluting
pollution
private
production
productive
property
protected
protection
refinery
secure
security
smoke
smokey
stacks
states
steam
steel
sunflower
toxic
united
warming
wire
voltage
power
hazardous
poison
poisonous