All terrestrial energy sources except nuclear, geothermal and tidal are from current solar insolation or from fossil remains of plant and animal life that relied directly and indirectly upon sunlight, respectively. Permanent Green Energy Production Victoria V. Petrescu, Aversa Raffaella, Apicella Antonio, Florian Ion T. Petrescu | Bucharest Polytechnic University, Second University of Naples 04/11/17, 08:23 AM | Solar & Wind , Biomass & Geothermal After 1950, began to appear nuclear fission plants. The fission energy was a necessary evil. In this mode it stretched the oil life, avoiding an energy crisis. Even so, the energy obtained from oil represents about 60% of all energy used. At this rate of use of oil, it will be consumed in about 60 years. Today, the production of energy obtained by nuclear fusion is not yet perfect prepared. But time passes quickly. We must rush to implement of the additional sources of energy already known, but and find new energy