(FILES) This picture taken on May 23, 2010 shows a Nepalese sherpa collecting garbage, left by climbers, at an altitude of 8,000 metres during the Everest clean-up expedition at Mount Everest. Climbers scaling Mount Everest will have to bring back eight kilograms (17.6 pounds) of garbage under new rules designed to clean up the world’s highest peak, a Nepalese official said March 3, 2014. AFP PHOTO/Namgyal SHERPA/FILES