The Lötschenlücke connects the Lötschental to the valley of a glacier with a length of about what in 2014?
Lötschenlücke: The Lötschenlücke (el. Aletsch Glacier: The Aletsch Glacier (German: "Aletschgletscher" ) or Great Aletsch Glacier ("Grosser Aletschgletscher ") is the largest glacier in the Alps.
i don't know