auto
automobile
boil
boiler
capacity
chemical
chemistry
chimney
energy
engineer
engineering
environment
factory
fuel
gas
gasoline
heavy
industrial
industry
landscape
light
liquid
manufacturing
metal
night
oil
petrochemical
petroleum
pipe
pipeline
plant
pollutant
pollute
pollution
power
power plant
product
production
refine
refinement
refinery
sky
smoke
sphere
steam
storage
tank
technology
tower
worker