black
building
business
chemical
chemistry
chimney
construction
dark
electric
electrical
electricity
energy
engine
engineering
environment
environmental
factory
fuel
gas
generator
heavy
industrial
industry
infrastructure
light
manufacturing
metal
night
oil
people
petrochemical
petroleum
pipe
pipeline
plant
pollution
power
production
refinery
sky
smoke
station
steam
structure
sunset
support
technology
tower
tree
turbine