(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. Ever more popular, the successive camps leading to the summit of Everest are flooded with waste, "foul" in places. Deeming the cleaning campaigns insufficient, a team of French students is striving to set up a recycling center at the foot of the roof of the world. (Photo by Namgyal SHERPA / AFP)