Environment News Service: Costa Rican Christiana Figueres Named UN Climate Change Chief Environment News Service (ENS) Costa Rican Christiana Figueres Named UN Climate Change Chief NEW YORK, New York, May 17, 2010 (ENS) – Christiana Figueres of Costa Rica has been selected to lead United Nations’ efforts to combat climate change. Appointed today by UN Secretary-General Ban Ki-moon, she will become executive secretary of the UN Framework Convention on Climate Change, UNFCCC, when Yvo de Boer of …