What is the primary concern regarding persistent pesticides?

The primary concern regarding persistent pesticides is that they can accumulate in the environment. These substances resist degradation and can remain in soil, water, and living organisms for extended periods. This accumulation can lead to various environmental issues, including contamination of water supplies, harm to non-target species, and disruption of ecosystems. It raises significant concerns about their long-term impact on wildlife and human health, as these chemicals may enter the food chain and bioaccumulate in organisms, which can result in toxic effects even at low concentrations. Thus, understanding the persistence of these chemicals is crucial for effective environmental management and pesticide regulation.