The action of wind and water can form cave openings like natural rooms within the rock.
VOA: special.2009.07.20
What was thrown into the neighborhood garbage pails after Thanksgiving had fed me nicely for several days, but I was chilled as I foraged, and within a week thewind was whistling through the siding of my attic hideout.
Although the landscape can shield people from sound, the report says one respondent living within 1km of a wind farm said the sound echoed off a nearby mountain into the valley where they lived.
However, given the rapid increase in demand for natural resources from countries like China and other BRICS countries, they have become the new targets of resource extraction and could wind up like the Hotspots within a few decades.