is by far the most dangerous of plastic resins and has been widely
connected to cancer and other health disorders resulting from
dioxin poisoning: Dioxin is the common name for a class of 75
chemicals. Dioxin has no commercial use. It is a toxic waste
product formed when waste containing chlorine is burnt (trash
burning is a major source!) or when products containing chlorine
are manufactured. PVC plastic is a major source of chlorine..."