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Portrait of Asian outdoor healthcare worker in multi-purpose respirator half mask with protective clothing looking at camera on chemical fume background
aerial panoramic view on smoke of pipes of chemical enterprise plant. Industrial landscape environmental pollution waste plant. Air pollution concept.
Young scientist or technician work standard curve in fume hood for analysis concentration range of total iron in transparent flasks.
Copper oxide fumes Emitted during copper smelting; irritates respiratory system.
air pollution incident as a faulty diesel power generator exhaust pipe emitted heavy black smoke of burned motor oil into the air

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