(The processes are) doubly ruinous: they impoverish the earth by hastily removing, for the benefit of a few generations, the common resources which, once expended and dissipated, can never be restored; and second, in its technique, its habits, its processes, the paleotechnic period is equally inimical to the earth considered as a human habitat, by its destruction of the beauty of the landscape, its ruining of streams, its pollution of drinking water, its filling the air with a finely divided carboniferous deposit, which chokes both life and vegetation.