Ingles

Energy source

The power sources are working more or less complex nature of human beings that can extract energy to perform a particular job or get some use. For example wind, water, sun, amongothers.
Since prehistoric times, when mankind discovered fire for warmth and roasting, to the Middle Ages in which built windmills to grind wheat into modern times in which electrical energy can befisionando the atom, man has sought endlessly energy sources from which some benefit to our days, that fossil fuels have on one hand the coal to power steam engines and traction rail industry andhouseholds, and secondly, oil and its derivatives in the industry and transport (mainly cars), although they coexisted with smaller-scale exploitation of wind energy, hydro and biomass. This model ofdevelopment, however, is doomed to depletion of fossil resources, without possible replacement would be needed for periods of millions of years to form.
The quest for inexhaustible energy sources and theintent of the industrialized countries to strengthen their national economies by reducing dependence on fossil fuels, concentrated on foreign soil after the exploitation and near depletion of ownresources, led to the adoption of energy nuclear and those with sufficient water resources, hydraulic intensive use of its waterways.

At the end of the twentieth century began to question the prevailingenergy model for two reasons:

• Environmental problems arising from the combustion of fossil fuels, such as smog episodes of large cities like London or Los Angeles, or global warming.
• The risksof using nuclear energy, manifested in accidents such as Chernobyl.
Clean energies are those that dramatically reduce environmental impacts produced, among which include the use of:
• Solar energy,the sun produces light and heat. All living things need sunlight to live. And now it uses light and heat from the sun to produce electricity, especially in housing.
• Wind power, once used to move...