When you attempt to scale Mt. Everest, you need to bring a lot of stuff: tents, sleeping bags, food, ropes, pick axes, clothes, and perhaps most importantly, oxygen tanks. The air is so thin, at some point it contains a third of the oxygen of lower altitudes. A climber can only survive for up to three days in such conditions. Many have not survived and have left their bodies behind in addition to all sorts of litter--tons of it.
Mt. Everest is a holy place for the Nepalese people and some of the Sherpas who guide climbers up to the topmost peak are able to now clean up the mountain top because the snow melt has allowed them to see the garbage to clear it.
Enough snow is now gone, it is worth it to climb up and retrieve tons of litter and several bodies of dead climbers.
So, there's an upside to global warming!!