http://www.nature.com/nsu/011011/011011-14.html
(1) Arsenic contaminates (many) water wells in Bangladesh. (2) UNICEF sunk some in the 70s and 80s; the British Geological Survey in the 80s and 90s. The government is suing the BGS--but not UNICEF--because UNICEF could not have been expected to have anticipated the problem. (Huh?)