 Then, gradually, between 1914 and 1958, San Giorgio was the subject of a marked urbanization that led to the occupation of most of the area of the municipality.At the same time, there has been a significant increase in the number of new citizens entering the area, who have started to work in the fledgling industries in the area; as can be seen from demographic trends, between 1861 and 1961, the population of San Giorgio quadrupled.Then, due to the various economic crises that followed in the decades of the 20th century, a new phase began that led to the closure of many companies with the consequent birth of many brownfield areas, many of which were recovered.