This article shows how the discovery of electrical energy that could be transmitted and used in industry triggered a huge effort to take advantage of Southern Italy's water resources and improve its natural environment. In the early years of the twentieth century, primarily through the initiative of Francesco Saverio Nitti, the great statesman and environmental expert, the rivers and forests of the South became an object of particular attention in that they were to be the central element in conservation measures whose aim was to produce cheap electricity, but which also necessarily involved reforestation, state control of forestry, the embankment of rivers and other changes. For southern reformers such plans were envisaged as the way to launch industrialization in the South.