ULAN BATOR, Jan. 15 (Xinhua) -- At least nine of all the 21 Mongolian provinces have been experiencing extreme wintry weather, known as "dzud," the country's National Emergency Management Agency (NEMA) said Wednesday. Dzud is a Mongolian term to describe a severely cold winter when a large number of livestock die because the ground is frozen or covered with snow. "At least nine provinces, including Uvs, Kho