Am 241 - a radioactive metal that constantly emits nuclear radiation is in your smoke detector.
Nuclear radiation is known to influence our immune system.
I am sure that you will be fascinated to find out. Uranium based atomic reactors produce significant amounts of highly radioactive waste in the form of plutonium. To dispose it - a clever plan is needed. Of course, people have to be kept scared and misinformed to the greatest extent possible, like in religion, so that they follow the flock without questioning, and even pay their own money for joining in. The rest are details.