via Dr ALISON BLEANEY

Of all toxic chemicals, dioxins may be the most widespread. The body fat of every human being, including every newborn, contains dioxins. Dioxins are formed by the incineration of products containing PVC, PCBs and other chlorinated compounds; as well as from industrial processes that use chlorine, such as pulp and paper manufacturing; and from the combustion of diesel and gasoline. Dioxins break down very slowly; they accumulate in fat of wildlife and bioaccumulate across the food chain. Read more here