team asian ecologists and biologists examine and sample takes dead fish and aquatic animals from wastewater discharged from sewers

analysis animal aquatic asian biohazard biologists biology biotechnology checking chemical chemist computer danger dead dirty discharge ecologists ecology ecosystem environment environmental equipment exam examination fish flask flow gas glasses glove goggles group industrial industry infection keeping laptop looking manufacturing mask men microbiology nature notebook oil outdoors outside people person pipe poisonous pollution ppe problem professional protection refinery research river safety sample science scientific scientist sewage sewer smoke stream team technician technology test toxic uniform waste wastewater water women work zone