Green energy sources are considered “greens” because they are perceived to reduce carbon dioxide emissions and to not cause pollution.

The force of wind and water were the single forms of energy used in a few centuries ago. These strengths have provided the energy necessary for operation of mills, Christopher Columbus discovered America in 1492 propelled in exclusivity by the wind. Today, after more than 500 years, in a time where we start to feel the effects of pollution we refocus and rediscover what seemed forgotten by previous generations.

Solar energy formed the origin of all energies used by all mankind. Heliothermal potential equates to over 12,000,000 billion t conventional fuel per second. Of this 80%, is consumed for evaporating water, 16% in photosynthesis, and the remaining 4% could ensure full replacement of fuel consumption.

Sun is, undoubtedly, a vast source of energy. In one year, he send to Earth 20,000 times energy for entire world population. In only 3 days, the Earth receives from the Sun energy equivalent in fossil fuel reserves.

In 1975, when the American satellite Vanguard used for the first time solar batteries, that energy from light has been transformed in electric energy and to present projects, have been taken important steps to harnessing solar energy.

Unconventional energy is free, also unconventional energy price do not increases, because the resources from that are produced are free.

Solar panels, solar collectors, micro-hydro water turbines, wind turbines, micro-hydro plants, all installations of this kind do not require any maintenance, those are operating long time period.