architecture
big
blue
chemical
construction
container
crude
depot
diesel
economy
energy
factory
flammable
fuel
fumes
gas
gasoline
industrial
industry
ladder
liquid
metal
natural
oil
oilfield
petroleum
pipework
plant
pollution
power
processing
production
pump
refinery
reserve
reservoir
round
silo
sky
smog
stair
steel
storage
store
tank
tower
valve
warming
white
work