Nepali airline staff prepare to load waste collected from the Everest region at Lukla Airport, the gateway of Mt. Everest, in Lukla, Nepal, 17 March 2018. A clean-up campaign has begun at Mount Everest, aiming to airlift 100 tonnes of rubbish left behind by tourists and climbers of the world's highest mountain. (Photo by Bikas Karki/EPA/EFE)
