"This booklet addresses concerns about the connection between cancer and exposure to toxic substances in the environment. It contains information about which types of substances are either known to cause or likely to cause cancer, and what can be done to reduce exposures to them. It also explains ho...

NCI is part of the National Institutes of Health under the United States Department of Health and Human Services. They are the government agency responsible for conducting and supporting research on cancer. Services provided include extensive online cancer information, the Physicians Data Query (PDQ...

This document is part of the NCI's 'Cancer Facts' series. Using a question and answer format it describes what radon is, how radon causes cancer, how people are exposed to radon, it's link to lung cancer, and testing your home for radon.