atom
barrel
biohazard
caution
chemical
container
contamination
danger
dangerous
design
disaster
disposal
dump
ecology
emitting
energy
environment
flat
fuel
gallon
garbage
hazard
hazardous
icon
illustration
industry
isolated
leak
liquid
material
nuclear
object
poison
pollution
radiation
radioactive
radioactivity
resource
risk
safety
solid
spill
storage
substance
symbol
tank
toxic
utilization
waste