This combination of pictures created on June 21, 2019 shows different kinds of waste found on the Mer de Glace, France's largest glacier, after the melting of ice in Chamonix on June 18, 2019. (Photo/Agencies)
A man walks near big sheets used to slow down the melting above the grotto carved inside the Mer de Glace glacier in Chamonix on June 17, 2019.(Photo/Agencies)
Aspiring Mountain guide Yann Grava takes a rest near the Mer de Glace glacier at the Charpoua Refuge (mountain hut) on June 19, 2019, in Chamonix. (Photo/Agencies)
A man points at a spot on the map of the Mer de Glace glacier at the 'Refuge du Requin' (mountain hut) in Chamonix on June 17, 2019. (Photo/Agencies)
Aspiring mountain guide Yann Grava takes a rest while climbing to the 'Refuge du Requin' (mountain hut) above the Mer de Glace glacier in Chamonix on June 17, 2019.(Photo/Agencies)
People walk on stairs built to reach the Mer de Glace glacier in Chamonix on June 17, 2019.(Photo/Agencies)
The board indicating the level of the Mer de Glace glacier in 1990 is pictured in Chamonix on June 17, 2019.(Photo/Agencies)
