(1) Starfish Prime 1962 - after effects - radiation belts around the earth. Read Wiki on 'Nuclear fallout' subheading 'worldwide':

"The radio-biological hazard of worldwide fallout is essentially a long-term one because of the potential accumulation of long-lived radioisotopes (such as strontium-90 and caesium-137) in the body as a result of ingestion of foods containing the radioactive materials."

We have items such as these: http://www.lessemf.com/mw-oven.html. because microwave ovens leak radiation. We are also being sold chopping boards and counter tops made from granite, a substance known to leak radon gas. Read 'Granite' wiki and subheading 'natural radiation':

"There is some concern that materials sold as granite countertops or as building material may be hazardous to health. One expert, Dr. Dan Steck of St. Johns University, has stated[13] that approximately 5% of all granites will be of concern, with the caveat that only a tiny percentage of the tens of thousands of granite slabs have been actually tested. Various resources from national geological survey organizations are accessible online to assist in assessing the risk factors in granite country and design rules relating, in particular, to preventing accumulation of radon gas in enclosed basements and dwellings."

Radiation sterilization of medical devices. The list goes on.