[unclear: CDD]

This compound, 2,3,7,8-. [unclear: Hrachlorodibenzo]-p-dioxin, is one of a [unclear: amily] of compounds known as dioxins. It [unclear: i] formed in the manufacture of the [unclear: richlorophenol] used to make 2,4,5-T. Although it has not been feasible to [unclear: ompletely] eliminate TCDD, it is present in [unclear: ommercia] supplies in less than five parts [unclear: ier] 100 million parts of 2,4,5-T (equivalent to one inch in 320 miles).

TCDD is one of the most toxic chemicals known—an emotionally charged statement which obscures the fact that the amount present in agricultural pesticides is not enough to endanger human health or to affect plants or animals in the environment.

For instance: A report of the Council for Agricultural Science and Technology states that to get a lethal dose, an 80-kg (175 lb) animal with the sensitivity of a rat would have to comsume all of the treated vegetation on more than 400 acres of land.