The melting of the ice due to global climate change, which also contributes to smaller ice sheets/glaciers, and the increased breaking of these ice sheets.
Glaciers had created the Great Lakes.
-Rhear
“Glaciers not only transport material as they move, but they also sculpt and carve away the land beneath them. A glacier's weight, combined with its gradual movement, can drastically reshape the landscape over hundreds or even thousands of years. The ice erodes the land surface and carries the broken rocks and soil debris far from their original places, resulting in some interesting glacial landforms.” nsidc.org
As a way to ensure that deaf and blind individuals would be able to live and work in the community of their choice
C the size of glaciers in alaska