Without clothes, the human body is vulnerable, its life or death at the whim of the elements. Global warming is stripping glaciers, making the whole planet vulnerable to extreme weather, floods, sea-level rise, reducing food, water and carrying capacity, increasing disease and dislocation.
Most glaciers in Switzerland will completely disappear by 2080, leaving nothing but rock debris, if climate change continues at its current rate. They have already lost 1/3 of their surface and 1/2 of their mass, and this melting is accelerating. The Aletsch retreated 115 meters (377 feet) in a single year 2005-06.