WASHINGTON, Okutobala 23, 2011 / PRNewswire-USNewswire / - Kwa nthawi yoyamba m'mbiri, US department of State (DOS) ikuwunika malamulo apadziko lonse lapansi omwe angaletse mankhwala okhala ndi ma mercury kuphatikiza kudzaza mano kwa siliva / amalgam, komwe kuli 50% mercury ndipo ali kale mkamwa mwa zoposa Anthu a ku America a 122.
