Two Sherpas,
Apa Sherpa and Phurba Tashi, hold the joint record for most Everest ascents.
The pair have each managed to reach the summit an impressive 21 times. Phurba
reached the top of the world three times in 2007 alone, and Apa has
successfully summited the mountain almost every year between 1990 and 2011.Apa
says that he has seen clear changes on Everest caused by global warming over
the years. He has spoken of his concerns over melting snow and glaciers, which
expose the rock and make it increasingly tough to climb. He also worries for
the well-being of Sherpas, after losing his own home in a flood caused by the
melted glaciers. Apa has dedicated several Everest ascents to raising awareness
of climate change.
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