燃やす
blue
building
chemical
chimney
combustible
complex
economy
electricity
energy
engineering
environment
environmental
facility
factory
fuel
gas
global
heat
heavy
high
hot
industrial
industry
modern
oil
petrol
pipe
pipeline
piping
plant
pollution
power
production
pump
refinery
science
sky
station
steam
steel
structure
supply
system
tube
turbine
urban
valve