barrel
blue
canister
cask
chemical
container
danger
diesel
dirty
disaster
disposal
drum
ecology
energy
environment
factory
fossil
fuel
gallon
garbage
gasoline
grunge
heap
industrial
industry
junk
junkyard
liquid
many
metal
oil
petroleum
pile
pollution
power
rectangles
recycled
recycling
revetment
shape
solid
stacked
steel
tank
toxic
urban
wallpaper
walls
waste
white