barrel
biohazard
biological
blue
brass
cartoon
cask
chemical waste
concept
contagion
container
contamination
crate
damage
debris
dispose of
drawing style
drum
figure
fuel
gallon
garbage
icon
idea
illustration
industrial
industry
infect
isolated
item
material
medical waste
microorganism
object
oil
organism
pollution
procedure
product
storage
substance
symbols
tank
threat
toxic
toxin
traditional
virus
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