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Team ecologists examine wastewater with pH test results of water discharged from pipes of refineries into nature to prevent chemical contamination biohazard. Pollution and toxic problem environment.
Brown sign warning to have No Contact with Water. Pictograms for no drinking or touching water. Reclaimed recycled water.
Aerial view of river contaminated with black hazardous liquid
fresh raw minced meat close-up
Workers wear protection suit checking chemical in old factory. Protecting Against Hazards and Contamination. Emergency Response to a Radioactive Accident.

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