A further discussion of polonium in food and water is linked at the bottom of the page. It may be possible to reduce your polonium intake through smoking cessation or merely switching to an organic brand of tobacco. That phosphate fertilizer contains natural radioactivity is a well established fact. BC Government Health website Radon is a naturally-occurring, radioactive gas which is given off by traces of uranium in soil and rock. Ministry of Health estimates that about 100 people a year die of radon induced lung cancer in the Province of British Columbia.
Radon likely causes more lung cancers than second hand tobacco smoke.
US Government geology website Radon is a gas produced by the radioactive decay of the element radium .Radon itself is radioactive because it also decays, losing an alpha particle and forming the element polonium. Polunium is also radioactive - it is this element, which is produced by radon in the air and in people's lungs, that can hurt lung tissue and cause lung cancer. It is created when sulfuric acid is used with phosphate rock to produce phosphoric acid. Phosphoric acid is used in the production of phosphatic fertilizers. Because of other elements present in phosphates deposits such as uranium and cadmium, phosphogypsum typically contains radon and other radioactive materials and can be extremely hazardous.