Nuclear radiation, plutonium and other poisons entering our environment wherever we are. The effects of radiation include cancer, DNA damage, reproductive damage, hormonal damage, and thyroid damage [that's why they want you to take potassium iodine, another dangerous toxin] but I wouldn't. There is a much safer substances. Instead you can use natural substances. There is one that is strong enough to protect against radiation. A good article on radiation sickness protection that shows what you can do is here: http://thehealingfrequency.com/zeolite/