The National Institute of Environmental Health Sciences (NIEHS) conducts research into the effects of the environment on human disease, as one of the 27 institutes and centers of the National Institutes of Health (NIH). It is located in the Research Triangle Park in North Carolina, and is the only primary division of the NIH located outside of the Washington metropolitan area. As an institute of the National Institutes of Health, the NIEHS supports environmental health research with the mission of reducing environmental disease, advancing basic, environmental health and clinical science, and increasing the availability of researcher and worker training. Source: Wikipedia (en)