 The mountainous area is now witnessing a considerable depopulation — as elsewhere in Italy, in the second half of the 20th century settlements at the highest elevations have been rapidly losing their inhabitants to the plains.The most important growth areas since the period following World War II have been Borgo Trevi (commercial, residential, and offices), Pietrarossa (industrial), and Matigge (light and medium industry, commercial).Many rivers and canals, none of them very large, run in a general south-to-north direction, converging into a single river near Bevagna.