are dioxins harmful
Dioxin Key Facts. 1  Dioxins are called persistent organic pollutants (POPs), meaning they take a long time to break down once they are in the environment. 2  Dioxins are highly toxic and can cause cancer, reproductive and developmental problems, damage to the immune system, and can interfere with hormones. Dioxins are found throughout the world in the environment and they accumulate in the food chain, mainly in the fatty tissue of animals.