338,000 Litres a Season: Tourists’ Waste Melting Everest’s Ancient Ice

The Khumbu Glacier, the frozen artery of Mount Everest, is succumbing to a peculiar form of thermal erosion. While global warming is the primary driver of glacial retreat, recent data from Nepalese researchers reveals a localized but potent catalyst: the metabolic heat of thousands of climbers and staff stationed at the Base Camp. The central issue is not merely pollution, but a thermodynamic imbalance. At an altitude of 5,364 meters, the Base Camp functions as a high-altitude urban center. In the spring of 2023, the population peaked at 2,127 people. Given that the average expedition participant spends roughly 50 days on the glacier, the volume of human waste becomes a significant geological factor. According to the Department of Survey and Mapping of Nepal, a person under extreme high-altitude stress excretes approximately 3.18 liters of urine per day. This results in a cumulative seasonal discharge of 338,299 liters—over 6,000 liters daily—directly onto the ice. This liquid, exiting the body at roughly 37°C, acts as a thermal reagent in an environment where temperature stability is critical.