Western Norway consists of tall mountains and deep fjords. The sun hits the water in the fjord, reflects to the mountain and heats the mountain. This has made areas such as Sogn and Hardanger good for farming fruits. Especially apples plums, strawberry and cherries. They also have animals at the farm, and especially the goat cheese they make is famous for its quality.
However, in such steep mountains it is particular difficult to do farming. It means carrying fruits and grass from high up in the mountain and down to the farm. Can also be milk or dead wild animals they have hunted. To do all this easier, zip lines have been to a great help, especially in the old days.
Here's an old video, demonstrating different zip lines. Some for bringing commidies only down the mountain and some both up and down. Some are driven by engine and some only rope work. There are some knot demonstrations when they are tieng up big chunks of grass to be taken down the mountain. Especially interesting for those trucker hitch guys I know frequents the forums.
Here is the video
https://tv.nrk.no/program/frep00000277/paa-loepestreng-over-fykse-paa-loeypestreng-over-fykse