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Wastewater treatment worker is collecting water samples from a public canal to test for contaminants
Bacteria structure 3D model. Escherichia coli, pseudomonas pathogenic microorganisms with flagella and cell membrane details. Infection biology, antibiotic resistance research, bacterial biotechnology
Businessman with protective mask holding a crate with polluted poisonous vegetables, food pollution concept
Hygiene inspector certify stuff officer work in science factory laboratory. people in pharmaceutical medicine production process inspector.
Toxic chemical gas leak safety team working cleaning in danger factory workshop environment contamination safety and protection

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