January

• 10 January - The World Bank
  World Bank
  The World Bank is an international financial institution that provides loans to developing countries for capital programmes.The World Bank's official goal is the reduction of poverty...
  
   announced that tests on water well
  Water well
  A water well is an excavation or structure created in the ground by digging, driving, boring or drilling to access groundwater in underground aquifers. The well water is drawn by an electric submersible pump, a trash pump, a vertical turbine pump, a handpump or a mechanical pump...
  
  s in Bangladesh have shown that about 40% are contaminated with arsenic
  Arsenic
  Arsenic is a chemical element with the symbol As, atomic number 33 and relative atomic mass 74.92. Arsenic occurs in many minerals, usually in conjunction with sulfur and metals, and also as a pure elemental crystal. It was first documented by Albertus Magnus in 1250.Arsenic is a metalloid...
  
  .

November

• 17 November - February 21 is declared International Mother Language Day
  International Mother Language Day
  International Mother Language Day is an observance held annually on 21 February worldwide to promote awareness of linguistic and cultural diversity and multilingualism. It was first announced by UNESCO on 17 November 1999...
  
   in the 30th General Conference of UNESCO
  UNESCO
  The United Nations Educational, Scientific and Cultural Organization is a specialized agency of the United Nations...
  
  .