architecture
block
building
business
chimney
city
cityscape
collection
company
construction
contamination
conveyer
conveyor
crane
dirty
distribution
electricity
energy
engineering
environment
estate
factory
graphic
hangar
icon
industrial
industry
manufactory
manufacturing
mill
modern
nuclear
oil
pipe
plant
pollution
power
power plant
production
pump
refinery
set
site
smoke
smokestack
structure
town
view
warehouse