Environmental Health Perspectives (EHP) is a peer-reviewed journal published monthly with support from the U.S. National Institute of Environmental Health Sciences (NIEHS). The primary purposes of EHP are to communicate recent scientific findings and trends in the environmental health sciences; to improve the environmental health knowledge base among researchers, administrators, and policy makers; and to inform the public about important topics in environmental health. For 2014 EHP has an impact factor of 7.98.