Pollution and Human Health Practice Test

Eutrophication, because nutrient enrichment converts PCBs into harmless compounds and concentrates them only in algae at the surface.

Denitrification, because bacteria transform PCBs into nitrogen gas that accumulates in fish muscle tissue over time.

Thermal stratification, because warm surface water chemically creates PCBs that only top predators can synthesize internally.

Biomagnification, because persistent, fat-soluble pollutants increase in concentration at higher trophic levels, raising risks for frequent fish consumers.