Affect the environment. -Algae, oxygen on growth, oxygen in the water decreases, è è, dead water animals. -Sun visor è algae organisms are underside affected. -Certain types of algae release toxins. È harms animals human exoskeletons è -Algae, death caused by microbial degradation è Oxygen, oxygen in the water decreases, è -Algae die è shallow water in a mess
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