Explain how environmental contaminants make their way into and through the food chain.

Environmental contaminants make their way into lakes, rivers, and groundwater and many other places. Animals drink that water. Our crops absorb that water that seeps into the soil, those crops are consumed by animals and humans. Therefore those animals are contaminated with whatever contaminant they consumed. In return those animals are ingested by the predator that consumes it therefore passing through the food chain.