scientist exploring the territory emission area polluted water man protective suit installing warning signs |
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| navigate by keyword : analysis analyze anger bacteria biohazard biological biology chemical danger disaster ecology emissions environment environmental epidemic examine expertise gloves health impurities infection laboratory lake liquid liquidator man mask measurement mud nature pointing pollution professional protection protective radiation research researcher science scientific scientist sewage sign study test toxic warning waste water |
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| Scientist wearing white protective coverall and gas mask standing next to a biohazard sign at contaminated water. Don`t enter dangerous zone, keep away, man pointing aside |
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