Affiliation:
1. University of Bologna, Italy
Abstract
The main types of renewable energies are reviewed in relation with currently available technologies, planet's emergencies and strategies towards sustainable development. The discussed issues are: the limited space for living, the biospheric degradation upon fossil fuels burning, the change of paradigm of human happiness from consumption to cultural development, a continuous improving of conversion of the low density and intermittent sun light on final energy on an industrial scale, the need to reintroduce the concepts of “enough” and “equity” while developing the know-how patrimony and good practices for the next generations.