Nepalese Apa Sherpa, who has ascended Mount Everest a record 20 times, is leading a team of 58 people to collect garbage in base camps as part of a campaign to promote conservation and eco-friendly climbing.

http://www.france24.com/en/20110406-super-sherpa-everest-cleaning-climb,
http://www.redorbit.com/news/science/2025800/sherpa_on_quest_to_clean_up_everest/