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Laboratory fume hoods in chemistry classroom interior of university college for protect the user from inhaling toxic gases (fume hoods, biosafety cabinets, glove boxes).
Working oil refinery. Smoke from the factory chimney. Ecological pollution. Air emissions polluting the city. Industrial waste is hazardous to health. Large factory in smog, Production in operation.
Sterile microbiological fume hood with stacks of Petri dishes and tube racks inside. A place for research and analysis.
Air pollution from car exhaust smoke traffic in the city. Reducing global warming pollution and carbon dioxide from engine combustion.
Laboratory fume hoods in science classroom interior of university college for protect the user from inhaling toxic gases (fume hoods, biosafety cabinets, glove boxes).

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