AFP : One of the first victims of global warming has almost disappeared. By next year, experts say the Chacaltaya glacier in Bolivia will have completely melted. Overlooking La Paz, Chacaltaya was once the highest ski slopes in the world, sitting at 5300 meters above sea level. According to experts, most tropical glaciers in the Andes are doomed as the earth's average temperature rises. In Boliva, many worry what will happen when one of the city's major water sources is gone