built
business
chemical
chemistry
chimney
color
construction
dark
day
diesel
distillation
distillery
ecology
economy
energy
engineering
environment
factory
fuel
gas
gasoline
industrial
industry
lighting
manufacture
metal
oil
petrochemical
petrol
petroleum
pipe
pipeline
plant
pollution
power
production
refinery
smoke
smokestack
stack
steam
steel
sunset
supply
technology
tower
tube
vertical