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Extinguished candle with smoke isolated on black background
Laboratory fume hoods in science classroom interior of university college for protect the user from inhaling toxic gases (fume hoods, biosafety cabinets, glove boxes).
Exhaust fumes from car exhaust pipe. Air emissions that lead to global warming on Earth.
Copper oxide fumes Emitted during copper smelting; irritates respiratory system.
Dirty Engine Motor Exhaust. Vehicle Emission Pollution

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