As it says here on the Swiss government site:
Between 1850 and 1970 alpine glaciers lost at least one third of their surface area and about half their density.A thin layer of ice and snow covers a steep slope of a Swiss mountain. Tourists walk along a narrow and slippery path in the middle of the mountain.
A thin blanket of snow covering a part of a Swiss mountain.
The rocky surface underneath the mountain can be seen underneath the thin layer of ice on this Swiss mountain.
The snow and ice has all but melted on this mountain slope in Switzerland.