abandoned
aged
background
barrel
black
brown
chemical
construction
container
crude
danger
diesel
dirty
drum
empty
energy
environment
environmental
fuel
garbage
gasoline
grunge
industrial
industry
iron
leak
metal
natural
nature
nobody
obsolete
oil
old
petroleum
pollution
risk
rock
rural
rust
rusty
sand
steel
stone
storage
sunlight
tank
toxic
trash
waste
water