right-to-know laws, laws that require employers to inform workers regarding health effects of materials they must handle, including toxic chemicals and radioactive substances. Under the authority of the U.S. Occupational Safety and Health Act of 1970, the National Institute for Occupational Safety and Health periodically revises recommendations or limits of exposure to potentially hazardous substances in the workplace. It also recommends appropriate preventive measures designed to reduce or eliminate adverse health effects of these hazards and publishes its recommendations in a variety of public documents.
