Global warming is melting the world's highest glaciers, scientists have concluded after studying the impact of climate change on the Alps. Two studies released on Monday by French researchers note that glaciers as high as 4,250 meters are actually a higher temperature than they were a decade ago. In the Andes, too, scientists are at work studying the 22 peaks which make up the "Sierra Nevada del Cocuy" in Colombia. In the past 150 years the area covered by glaciers has shrunk from 150 square kilometres, to 16. At this rate the mountains will be bare by 2025. Retransmission of an AFPTV report from the Ritak'Uwa Negra glacier, originally filmed in July 2007 and filed on July 17, 2007.