barrel
blue
business
cask
chemistry
cistern
construction
cylinder
dawn
desert
duct
dusk
energy
engineering
environment
factory
fuel
gas
gasoline
global warming
green
industry
keeping
label
mineral
oil
oil reservoir
petrochemical
petrochemical plant
piping
pollution
preservation
processing
receptacle
refinery
reservoir
resource
sector
sky
stockpile
storage
storehouse
storing
sun
tank
technology
tube
warehouse
white
work