04.12.2008WASHINGTON POST
Executive Secretary of the United Nations Framework Convention on Climate Change, Yvo de Boer, greets journalists as he arrives in a solar taxi to the U.N. Climate Change Conference in Poznan, Poland, Thursday, Dec 4, 2008. The solar vehicle, built by Louis Palmer from Switzerland with the help of Swiss scientists and driven by Palmer has traveled around the world setting a world record of 52,000 km, or 32,300 miles through 38 countries using only solar energy. (AP Photo/Alik Keplicz)