An Ecuadorian tree frog produces a natural organochlorine pain-killer many times stronger than morphine
Environmentalists frequently attribute levels of dioxins found in the environment to the production and disposal of chlorinated products, such as PVC. However, it is not justifiable to claim that they are primarily the result of man-made chlorine processes.
Forest fires, volcanic eruptions and even compost heaps are all sources of dioxin in the environment. In recent years, scientists have found that many chlorinated and halogenated compounds have been formed naturally in the environment long before chlorine was discovered. For example, dioxins have been found by Japanese scientists in sediment up to 8,000 years old.
