Semustine) 58 Chromium(VI) compounds 59 Ciclosporin 60 Contraceptives, hormonal, combined forms (those containing both oestrogen and a progestogen) 61 Contraceptives, oral, sequential forms of hormonal contraception (a period of oestrogen-only followed by a period of both oestrogen and a progestogen) 62 Cyclophosphamide 63 Diethylstilboestrol 64 Dyes metabolized to benzidine 65 Epstein-Barr virus 66 Oestrogens, nonsteroidal 67 Oestrogens, steroidal 68 Oestrogen therapy, postmenopausal 69 Ethanol in alcoholic beverages 70 Erionite 71 Ethylene oxide 72 Etoposide alone and in combination with cisplatin and bleomycin 73 Formaldehyde 74 Gallium arsenide 75 Helicobacter pylori (infection with) 76 Hepatitis B virus (chronic infection with) 77 Hepatitis C virus (chronic infection with) 78 Herbal remedies containing plant species of the genus Aristolochia 79 Human immunodeficiency virus type 1 (infection with) 80 Human papillomavirus type 16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59 and 66 81 Human T-cell lymphotropic virus type-I 82 Melphalan 83 Methoxsalen (8-Methoxypsoralen) plus ultraviolet A-radiation 84 4,4-methylene-bis(2-chloroaniline) (MOCA) 85 MOPP and other combined chemotherapy including alkylating agents 86 Mustard gas (sulphur mustard) 87 2-Naphthylamine 88 Neutron radiation 89 Nickel compounds 90 4-(N-Nitrosomethylamino)-1-(3-pyridyl)-1-butanone (NNK) 91 N-Nitrosonornicotine (NNN) 92 Opisthorchis viverrini (infection with) 93 Outdoor air pollution 94 Particulate matter in outdoor air pollution 95 Phosphorus-32, as phosphate 96 Plutonium-239 and its decay products (may contain plutonium-240 and other isotopes), as aerosols 97 Radioiodines, short-lived isotopes, including iodine-131, from atomic reactor accidents and nuclear weapons detonation (exposure during childhood) 98 Radionuclides, -particle-emitting, internally deposited 99 Radionuclides, -particle-emitting, internally deposited 100 Radium-224 and its decay products 101 Radium-226 and its decay products 102 Radium-228 and its decay products 103 Radon-222 and its decay products 104 Schistosoma haematobium (infection with) 105 Silica, crystalline (inhaled in the form of quartz or cristobalite from occupational sources) 106 Solar radiation 107 Talc containing asbestiform fibres 108 Tamoxifen 109 2,3,7,8-tetrachlorodibenzo-para-dioxin 110 Thiotepa (1,1,1-phosphinothioylidynetrisaziridine) 111 Thorium-232 and its decay products, administered intravenously as a colloidal dispersion of thorium-232 dioxide 112 Treosulfan 113 Ortho-toluidine 114 Vinyl chloride 115 Ultraviolet radiation 116 X-radiation and gamma radiation

International Agency for Research on Cancer (IARC)
What does Cigarettes Mean
15 years for the risk of heart attack and stroke to be roughly equivalent to a person who has never smoked
What scientists still dont know As researchers dig into specific types of memory, many questions remainparticularly around how individual factors shape cannabiss effects