To add to what everyone else is telling you Tobacco plants are also very good at absorbing **radiation**, notably in the form of Radon/Radium. Radium (which decays into Radon gas) is present in fertilizers and can further decay into polonium-210 which is particularly dangerous. While the amount of Radon is not high enough the get tobacco banned it is believed to have a synergistic effect with the other carcinogenic effects of smoking boosting the likelihood of lung cancer forming.
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