In this photo taken on Feb. 13, 2012 and released by The Great Himalayan Trail, veteran climber Apa Sherpa takes rest as he climbs the Himalayan mountains on the way to the Tshorolpa Glacier Lake, Nepal. The 51-year-old Apa is on a 120-day trek across Nepal to tell villagers about the danger of more devastating flash floods as glacial melt caused by climate change fills high-altitude lakes to the bursting point. (AP Photo/The Great Himalayan Trail) EDITORIAL USE ONLY

Associated Press
In this photo taken on Feb. 13, 2012 and released by The Great Himalayan Trail, veteran climber Apa Sherpa takes rest as he climbs the Himalayan mountains on the way to the Tshorolpa Glacier Lake, Nepal. The 51-year-old Apa is on a 120-day trek across Nepal to tell villagers about the danger of more devastating flash floods as glacial melt caused by climate change fills high-altitude lakes to the bursting point. (AP Photo/The Great Himalayan Trail) EDITORIAL USE ONLY
In this photo taken on Feb. 13, 2012 and released by The Great Himalayan Trail, veteran climber Apa Sherpa takes rest as he climbs the Himalayan mountains on the way to the Tshorolpa Glacier Lake, Nepal. The 51-year-old Apa is on a 120-day trek across Nepal to tell villagers about the danger of more devastating flash floods as glacial melt caused by climate change fills high-altitude lakes to the bursting point. (AP Photo/The Great Himalayan Trail) EDITORIAL USE ONLY
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