Which of the following is not a concern with toxic wastes?

The choice indicating that being beneficial for health is not a concern with toxic wastes is correct because toxic wastes, by definition, are substances that can pose serious risks to health and the environment. These wastes are typically hazardous and can lead to severe health issues, including fatalities when ingested, as well as adverse effects upon absorption through the skin or other routes.

The primary characteristics of toxic wastes include their potential to harm living organisms and the environment. Therefore, the notion that toxic wastes could be beneficial for health contradicts their very nature and the typical concerns associated with them. Toxic substances are primarily recognized for their harmful impacts, not for any beneficial effects on human health. This understanding is foundational in environmental health and safety practices, emphasizing the need for careful management and regulation of such materials to protect public health and the environment.