The Nepal government has been asked to consider installing portable toilets on Mount Everest to give mountaineers somewhere civilised to go. Apparently waste is becoming a problem on Everest, with it becoming littered with the debris of past exhibitions. Some of this waste such as human excrement can take decades to decompose due to the extremely cold conditions. Environmental groups believe that the installing lavatories will go some way to reducing the amount of waste left on the mountain. The Eco Everest Expedition, a Nepal based coalition of environmentalists who campaign to keep the mountain clean, have collected more than 13 tonnes of rubbish, 400 kilogrammes of human waste and four bodies from the mountain since 2008.