Environmental health officials say lead, mercury and other chemicals that were once thought to be safe in small amounts may have a profound effect on the developing brain.
Environmental kalusugan opisyal ng sinasabi lead, mercury at iba pang kemikal na na isang beses iisip na maging ligtas sa maliit na halaga ay maaaring magkaroon ng isang malalim na epekto sa ang pagbuo ng utak.