燃やす
air
chemical
chimney
complicated
construction
dioxide
distillery
energy
engineering
environment
environmental
equipment
factory
fuel
gas
gasoline
global
green
heavy
industrial
industry
metal
oil
petrochemical
petrol
pipe
pipeline
piping
plant
pollution
portugal
power
production
pump
refinery
science
sky
smoke
stack
station
steam
steel
technology
tower
toxic
tube
valve
warming