Tobacco is a plant originally indigenous to the Americas which is now grown across the world. Its leaves contain high levels of addictive chemical nicotine, and many toxicological chemicals and chemical groups including polycyclic aromatic hydrocarbons (benzopyrene- cancer causing chemicals), tobacco-specific nitrosamines (NNK, NNN), aldehydes (acrolein, formaldehyde), and tobacco smoke contain carbon monoxide, hydrogen cyanide, nitrogen oxides, benzene, toluene, phenols (phenol, cresol), aromatic amines (nicotine, ABP (4-Aminobiphenyl)), and harmala alkaloids