traffic sign
abstract
alert
background
bio
biohazard
biological
catastrophe
caution
chemical
concept
danger
danger sign
dangerous
element
epidemic
forest
graphic
hazard
hazardous
icon
illustration
infection
inform
information
label
marker
message
nature
outdoor
pictogram
risk
road sign
sign
street sign
symbol
toxic
travel sign
virus
warning
warning label
waste
weapon
yellow