Scientific research studies have revealed that tobacco smoke contains " Carcinogens" , which are the main cause of cancer. These carcinogens include seven types of polycyclic hydrocarbons along with a radioactive element. This radioactive element is

Tobacco smoke contains radioactive polonium-210, which is deposited in the lungs alongside various chemical carcinogens like polycyclic aromatic hydrocarbons. This radioactive element contributes significantly to the risk of lung cancer in smokers. The other listed elements are not the primary radioactive contaminants in tobacco smoke.