Agence France-Presse: The UN weather agency said Tuesday that El Nino, which wreaks havoc around the Pacific and east Africa, has dissipated, but La Nina — another disruptive weather phenomenon, is likely to develop. "Following the rapid dissipation of El Nino in early May 2010, cool-neutral to weak La Nina conditions have developed in the tropical Pacific," said the World Meteorological Organisation in a statement. "These conditions are more likely than not to strengthen into a basin-wide La Nina …