barrel
biochemical
biohazard
butt
canister
cartoon
cask
chemical
container
contamination
crude
dirty
disaster
drop
dump
ecology
energy
environment
equipment
freight
fuel
gallon
gas
gasoline
hazard
illustration
industrial
industry
liquid
nuclear
object
oil
overflow
petrol
pollution
power
radiation
radioactive
refuse
resource
risk
safety
set
storage
substance
tank
toxic
transportation
waste