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Snowy peak under starlit sky

Snowy peak under starlit sky

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Man climbing up mountain at Mt. Everest

Man climbing up mountain at Mt. Everest

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Sunset Over Mount Everest, Sagarmatha NP, Nepal

Sunset Over Mount Everest, Sagarmatha NP, Nepal

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FILE TO GO WITH Nepal-Everest-environment-climbing, FOCUS by Deepesh Shrestha (FILES) In this May 19, 2009 file photograph, unidentified mountaineers walk past the Hillary Step while pushing for the summit of Mount Everest as they climb the south face from Nepal. A group of top Nepalese climbers is planning a high-risk expedition to clean up Everest, saying decades of mountaineering have taken their toll on the world's highest peak. "Everest is losing her beauty," seven times Everest summitteer Namgyal Sherpa, 30, told AFP. "The top of the mountain is now littered with oxygen bottles, old prayer flags, ropes, and old tents. At least two dead bodies have been lying there for years now." AFP PHOTO/COURTESY OF PEMBA DORJE SHERPA (Photo credit should read STR/AFP/Getty Images)

FILE TO GO WITH Nepal-Everest-environment-climbing, FOCUS by Deepesh Shrestha  (FILES) In this May 19, 2009 file photograph, unidentified mountaineers walk past the Hillary Step while pushing for the summit of Mount Everest as they climb the south face from Nepal. A group of top Nepalese climbers is planning a high-risk expedition to clean up Everest, saying decades of mountaineering have taken their toll on the world's highest peak.  "Everest is losing her beauty," seven times Everest summitteer Namgyal Sherpa, 30, told AFP. "The top of the mountain is now littered with oxygen bottles, old prayer flags, ropes, and old tents. At least two dead bodies have been lying there for years now." AFP PHOTO/COURTESY OF PEMBA DORJE SHERPA (Photo credit should read STR/AFP/Getty Images)

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Everest's Khumbu Icefall

Everest's Khumbu Icefall