Because there is no planet B: Green Energy the solution will explain why do we need green energy.
Our planet is screaming for help, we can see at this moment so many problems associated with our environments like the melting icecaps, rainfall’s decrease, temperature increase, desertification and much more.
All the situation we are living right now is as a consequence of the contamination mainly produced by the energy industry.
Therefore, we are becoming clearer and more evident, that the mode of fossil fuel-dependent energy production is practically unsustainable and, at the same time, not very respectful to our planet.
It is then when we have the situation and doubts about how to stop this situation and that’s where the importance of green energy for the environment comes into play.
What are the green energies?
As the name implies, are those that do not produce polluting or contamination to the environment and in consequence, are healthy. These are energies that are obtained from different natural sources, such as the sun, wind or rain. In all cases of clean energy, we are also talking about that potentially, will never run out.
These types of energies are the ones that are currently being promoted with the aim of curbing and even counteracting the effects of climate change.
This process is what is known as the energy transition, which consists of the transition from a carbon-based sector (obtained by burning fuels such as coal and oil) to one based on green energies occupy a preponderant role.
Which are green energies?
Although green energies can take many forms and it is an industry looking forward to improving and change and progress, the most widespread are currently as follows:
It is obtained through sunlight and heat. It can be in two ways depending on the use of light or heat.
In the case of taking advantage of sunlight, this is done through solar panels, which, in broad strokes, are devices capable of transforming the photons of light into an electric current that can be used for human activities. This is called photovoltaic.
In the case of taking advantage of the heat of the sun. This type is used through large installations with many mirrors that direct and concentrate the sun’s rays at the same point, so that this point can be heated a lot and, thus, activate a mechanical system that is capable of producing movement which will later be transformed into useful electricity.
Photovoltaic panels: these panels transform the sun’s rays into electricity, which is stored in batteries or accumulators and can even be incorporated into the electricity grid.
Thermodynamic technology: it takes advantage of solar radiation as a source of caloric energy, using it to heat fluids that generate pressurized water vapor, and can subsequently use it in electricity.
Thermal technology: uses the sun’s energy to obtain heat, used to heat buildings, obtain hot water or for industrial applications.
It is obtained from the use of river flow and the natural movement of water. In this case, it is obtained by installing turbines on the banks or dams of the rivers, which allows the turbines to move just like watermills.
Later, this movement is transformed into electricity for domestic and industrial use.
This is obtained from the wind. The system is similar to that of hydraulic energy but, on this occasion, windmills (also called wind turbines) are installed at points where the wind is abundant, such as esplanades on land or in coastal areas above the sea.
The wind spins the windmill blades and, in this way, the movement can be converted back into electricity that is sent to the power grid.
It is obtained thanks to the use of the tides. This is achieved by installing an alternator that, taking advantage of the ups and downs of the tides, transforms the movement of the sea into electricity.
In this case, it is obtained from the use of heat from inside the Earth. By means of an installation that captures the heart, it is possible to activate a mechanical system that in turn, is responsible for producing the usable electricity.
Are nuclear energy and biofuels green energy?
Nuclear energy is very particular, since it is not associated with carbon and, therefore, it might seem at first that it would be green energy.
However, it is not exempt from producing highly polluting waste. In this case, radioactive waste that has to be conveniently isolated to avoid very serious damage. Therefore, it cannot be considered as a pure one.
On the other hand, we find biofuels. This type is obtained from the burning of fuels that are obtained from the reuse of organic matter.
This can be done by burning wood such as pellets, or by burning biogas, a type of gas that is obtained from the rotting of organic matter under certain circumstances.
This promises to have a relevant role in the future since they are much more environmentally friendly fuels.
In fact, because it can be obtained from organic matter, at least in principle, it could be considered as full-fledged green energy.
However, it is important to keep in mind that, with their burning, greenhouse gases (GHG) are released, although in much smaller quantities than when coal or petroleum products are burned.
Therefore, despite being considered by many as renewable energy, you cannot speak technically of it as such.
Green energies: importance, advantages, and disadvantages
Green energies arise as an alternative to the progressive decrease of non-renewable resources (fossil fuels: coal, gas, and oil), and at the same time as a solution to mitigate climatic problems in which we find ourselves.
Thus, the use of green energies has several advantages since they do not produce waste or pollutants, thus preventing the deterioration of the environment and contributing to curb global warming.
In addition, this type of energies offers the same efficiency and quality as the energies used today, more polluting.
The industrial and business sector also benefits from its use, since, at an economic level, they mean savings in waste management, given that it does not generate waste, so it is not necessary to have spaces or licenses for storage and destruction.
However, they also have certain drawbacks, such as the large surface territory occupied by facilities such as solar panels or wind farms, as well as the visual and landscape impact, although these are minorities in comparison with the multiple advantages they present.