Nearly six hundreds of naked people formed a “living sculpture” on Aletsch glacier before few of years against a global warming. Aletsch is the longest glacier in Europe, with a length of 23 km and it’s designated a UNESCO world heritage site. It is located at an altitude of 2,200 m in one of the highest stone pine forests in Europe. But Aletsch Glacier retreated 115 meters in a single year.

Over the last 150 years, the glaciers have reduced in size by approximately one third of their surface and half of their mass. The sciences said that most Swiss glaciers will disappear by 2080 if global warming continues at its current pace.

The people pose for U.S. photographer Spencer Tunick as part of a publicity campaign to expose the impact of climate change. “The melting of the glaciers is an indisputable sign of global climate change,” said the environmental group Greenpeace, which organized the event.