acid
atomic
barrel
business
chemical
color
container
contamination
cylinder
danger
disaster
drum
dump
ecology
energy
environment
fission
fluid
fossil
fuel
gallon
generation
gloss
hazardous
icon
illustration
industrial
industry
label
liquid
metal
nuclear
object
oil
petroleum
pollution
power
radiation
radioactive
radioactivity
resource
shiny
sign
substance
supply
symbol
toxic
transportation
warning
yellow