Definition of Clean Energies

As its name suggests, clean energies are those that do not pollute the environment. It should be noted that the Energy clean is also known as renewable energy. On the other hand, Energy sources opposed to clean are polluting and non-renewable, like oil or gas.

Clean energy sources are based on the use of natural resources; mainly the sun, wind, water and energy that comes from the interior of the earth or geothermal energy.

Solar energy

The Sun generates energy that can be translated into heat and electricity. The sun's rays become thermal energy and electric with which it is possible to heat homes and provide light. To make this possible, various photovoltaic systems and solar panels are used.

Wind power

The wind moves the blades of a wind turbine and the energy obtained is produced in turn electric power. It is considered clean energy because wind is an inexhaustible resource that is not associated with any aggression against the environment. Wind turbines began to develop after the 1973 oil crisis, when it was found that the Oil is a non-renewable, polluting source of energy that can generate economic instability at the level world.

Geothermal energy

This energy is that obtained from the internal heat of the Earth. It is concentrated in the so-called geothermal reservoirs. It must be taken into account that the center of the Earth is almost as hot as the Sun and the heat that is given off from its interior can be used. For this to be possible, it is necessary to have a heat source and a hot aquifer that can be crossed by the water that comes from natural underground sources. When all this occurs, geothermal reservoirs transform the energy obtained into electricity to heat homes, greenhouses or to dry wood.

New clean energy proposals

In recent years there have been significant advances in the search for non-polluting energy alternatives. In this sense, there are several new proposals:

1) new wind turbines have been designed to better store the wind power,

2) the force of the tides and waves is channeled into tidal energy and

3) solar cells are becoming thinner and this favors their energy efficiency.

Photos: Fotolia - freshidea / mast3r