The Everest mountaineers are told to carry their disposable waste back to Kathmandu for recycling. - Call from Nepalese authority

Hundreds of mountaineers from all over the world come to Nepal to climb Everest and other peaks of Nepal. But, over the decades tonnes of wastes such as food containers, bottles, spent oxygen cylinders, foods, plastics etc. have been left behind by the various teams at the Everest. In most cases, inexperienced climbers discard their waste to save their energy to reach the summit or the base camp. The Nepalese authorities are now argue to all the mountaineer to bring their own disposable waste back to the capital Kathmandu, so that they can be recycled properly.

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https://www.bbc.com/news/world-asia-28950453