sample of dirty water on white

analysis analyzing background biochemistry biology biotechnology bottle brown chemical chemist chemistry container contaminated contamination cut cutout detail dirty discovery ecologic ecology ecosystem environment environmental equipment exam examine experiment expertise flask fluid full garbage glass household impure indoor industrial industry isolated jar lab liquid measure measures microbiology nature nobody object one only out poison poisoned polluted pollution protection research sample science scientific septic simple studio technology test testing toxic unclean uncleanly unhealthful unhealthy unhygienic used vase waste water white