Which statement about dioxins is untrue? A. They are highly toxic chemicals. B. They may be produced as a byproduct of incineration. C. They require many years to decompose. D. They are never produced in the natural environment. E. None of the above.

D. They are never produced in the natural environment.

Explanation:

Dioxins are toxic chemicals that are produced when chlorine based compounds are burnt with hydrocarbon such as oil, wood or coal.

High levels are found in the environment in places such as

soil, sediments and food but low levels are found in plant.

Dioxins can stay in the human body for long time because of their chemical stability and it's ability to be absorbed by fat tissue.

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