A present day society has had to relocate from their coastal community and have taken refuge at the top of a very high mountain roughly 10,000 feet above sea level. This mountain is the most prominent around and its profile is very steep, approx 45 degrees, from top to bottom on all sides, with a flattened mesa on top. Very long ago the local people constructed a stainless steel pipe of approx 1 meter diameter and 5 miles in length to carry holy water down from the mountain but now that they live on the mountain they seemingly have no need for this pipe.
The people are looking for different ways that they could use this pipe to generate electricity for their new colony on top of the mountain.
One of the suggestions was to exploit the natural atmospheric pressure differential between the ends of the pipe with an internal turbine. Is this feasible?
Note: They don't see electricity generation as a worthy sacrifice for their 'holy water', i.e. hydroelectric generation.