The purpose is to create polluted smoke, which makes the air unbreathable and people have to cover their noses.
Palabras clave
pollution,
smoke,
air,
danger,
gas,
environment,
ecology,
filter,
industry,
safety,
industrial,
technology,
toxic,
protection,
health,
equipment,
dust,
security,
factory,
chemical,
isolated,
protective,
respirator,
mask,
illustration,
construction,
emission,
protect,
grey,
hygiene,
work,
metal,
warning,
nature,
sky,
steam,
people,
white,
environmental,
multipurpose,
care,
vector,
man,
carbon,
air pollution,
quality,
flat,
disaster,
bad
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