And every summer the snow and ice along the most frequented routes is tinged with a yellow-brown hue caused by urine, faeces and vomitus. A helicopter was used to fly the two dry toilets to the mountain top, bringing the total cost of the new sanitary installations to around €145,000. The toilets are to be emptied once a year and the unsavoury contents transported back down to the valley by helicopter. Waste has been a serious problem on the Mont Blanc for some time now.
Source: www.spiegel.de/international/zeitgeist (en)