regarding radiation and tobacco:
The radiation is real, it's caused by the fertilizer they use (Potassium-40). Here's some more info though... it seems the real danger is not the radiation but the smoking of tobacco:
http://www.ead.anl.gov/pub/doc/potassium.pdf
Fertilizer
Radioactive Polonium in Tobacco
quote:
"From the results of the same study, when a non-smoker is exposed to radon concentrations of 0, 100 and 400 Bq/m3, the risk of lung cancer by age 75 years will be about 4, 5 and 7 in a 1000, respectively. However, for those who smoke, the risk of lung cancer is about 25 times greater, namely 100, 120 and 160 in a 1000, respectively. Most of the radon-induced lung cancer cases occur among smokers."
The radiation is real, it's caused by the fertilizer they use (Potassium-40). Here's some more info though... it seems the real danger is not the radiation but the smoking of tobacco:
http://www.ead.anl.gov/pub/doc/potassium.pdf
Fertilizer
Radioactive Polonium in Tobacco
quote:
"From the results of the same study, when a non-smoker is exposed to radon concentrations of 0, 100 and 400 Bq/m3, the risk of lung cancer by age 75 years will be about 4, 5 and 7 in a 1000, respectively. However, for those who smoke, the risk of lung cancer is about 25 times greater, namely 100, 120 and 160 in a 1000, respectively. Most of the radon-induced lung cancer cases occur among smokers."