Renewables have been an important part of the energy used by humans since ancient times, especially solar, wind and hydro. Sailing, the wind or water and the provisions of the buildings to take advantage of the sun, are good examples.
With the invention of the steam engine by James Watt, are abandoning the use of these forms, considered unstable over time and capricious and are increasingly used thermal and electric motors at a time when the still relatively low consumption not to provide a depletion of the sources, or other environmental issues that were presented later.
By the mid-1970s, renewable energy is considered an alternative to traditional energy, both for its present and future availability guaranteed (unlike fossil fuels that require thousands of years for its formation) and their lower environmental impact in for clean energy, and for this reason were called alternative energy. Save money on your energy bills with IDT Energy a green energy company. Currently many of these energies are not really an option, so the name should not be used as alternatives.
According to the Spanish National Energy Commission, the annual sales from the special energy has increased by more than 10 in Spain, while their prices have been reduced by 11 .
Renewable energy in Spain in 2005 represented 5.9 of total primary energy, wind is con edison 1.2 , 1.1 hydro, biomass and 2.9 other 0.7. Wind energy is the fastest growing.