The Danish president of the U.N. climate conference, Connie Hedegaard, has resigned and will be replaced by the Danish prime minister as head of the historic talks. The change was announced Wednesday as the 193-nation conference enters into a higher phase of negotiations, with world leaders arriving. U.N. climate chief Yvo de Boer says Hedegaard will continue to lead informal talks but Prime Minister Lars Loekke Rasmussen will now be the formal head of the conference, according to a report of The Associated Press. Hedegaard says it"s appropriate for Loekke Rasmussen to preside with so many heads of state and government taking part.