Dioxins are highly toxic compounds that form upon the burning of certain plastics, especially polyvinyl chloride (PVC). Dioxins bioaccumulate, which means that animals higher in the food chain tend to have greater concentrations within their bodies. Most of our exposure to dioxins comes from the food we eat rather than the air we breathe. How many milligrams of dioxins are there in a liter of milk containing 0.20ppt ?
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