assembly
automotive
built
business
carbon
chemistry
chimney
co2
column
crude
diesel
distillery
economy
engineering
environment
evening
factory
flange
fuel
fuel oil
gas
gasoline
hamburg
industrial
industry
kerosene
lighting
magenta
oil
petrochemical
petroleum
pipes
plant
pollutant
pollute
power
processing
production
pump
refinement
refinery
smoke
smokestack
stack
steam
supply
tank
technology
tube
vapor