The data speak for themselves: the need for energy is destined to increase suddenly in the coming decades and to date we are still unable to produce enough of it or to produce it in a sustainable way. The alternative and renewable energies , the ' sustainability and respect for the environment are therefore issues that intersect with paths unavoidably decarbonizationand energy savings, so as to imagine a new balance capable of supporting the thirst for energy that the future will require. Photovoltaic, wind and other technologies are the tools of the present, but scientific research is making the sector take important steps forward: energy production must grow, but in this race it will have to seek the necessary compromises to guarantee ever less environmental impact and a increasing availability of electricity.