IARC’s monographs (International Agency for Research on Cancer, part of WHO) identify environmental factors (chemicals, complex mixtures, occupational exposures, physical and biological agents, and lifestyle factors) that can increase the risk of human cancer. Interdisciplinary working groups of expert scientists review the published studies and evaluate the weight of the evidence that an agent can increase the risk of cancer. Since 1971, more than 900 agents have been evaluated, of which approximately 400 have been identified as carcinogenic or potentially carcinogenic to humans. Most of the Monographs are available in the Public Health Library (call number RC267.A1.I2). IARC recently made available all Monographs back to 1999 online. More Monographs will be added to this site in the future.