Over 700 climbers and guides spend two months on Mount Everest each year . Their toilets are usually holes in the snow , a Nepalese official said . He said that the waste has been 'piling up ' for years around various camps .
Over 700 climbers and guides spend two months on Everest each year . Their toilets are usually holes in the snow , a Nepalese official said . He said that the waste has been 'piling up ' for years around various camps .