Volume 100 of the IARC Monographs, A Review of Human Carcinogens, covers all agents previously classified by IARC as carcinogenic to humans (Group 1) and was developed by six separate Working Groups: Pharmaceuticals; Biological agents; Arsenic, Metals, Fibres, and Dusts; Radiation; Personal Habits and Indoor Combustions; Chemical Agents and Related Occupations. This Volume 100E covers Personal habits and indoor combustions, specifically tobacco smoking, second-hand tobacco smoke, smokeless tobacco, N’-Nitrosonornicotine and 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone, betel quid and areca nut, consumption of alcoholic beverages, Chinese-style salted fish, and indoor emissions from household combustion of coal.