Energy is something so basic in the life of human beings in today's society that we could not live without it. It is worth emphasizing the importance of referring to the current moment since a couple of centuries ago, energy was a luxury that was not in almost anyone's day-to-day life. Each person had their own way of surviving, often in precarious conditions that today would be the most subhuman.
The discovery of fire was our first source of energy back in prehistory. With him we learned to warm ourselves, cook and even communicate. For many years this was the only energy we used for our benefit until we discovered oil. We stopped using coal to move locomotives with this substance due to its great energy power. Since we began to use electricity, oil or gas in the 20th century, society and the world underwent a radical change to move to a modern civilization in which industrialization has led us to have the luxuries and comforts that we have today. in day.
Due to new discoveries and research, energy has had to evolve because the sources used before were scarce and that implied a global catastrophe if, when the time came, we had not sought a solution to that problem.
Thanks to renewable energies, we have unlimited energy sources that are also much cleaner and more respectful of the environment. These energies have the ability to regenerate naturally after being consumed. The main renewable energies are:
- Hydraulic energy: The energy is extracted from the movement of water and does not pollute since the only fuel used is water. Its impact on the environment is very low, especially if the construction of dams or other facilities that alter the natural space are avoided.
- Wind energy: This energy is caused by the wind. Through the windmills installed in different parts of the planet (either on land or at sea), the wind transforms kinetic energy into mechanical energy.
- Solar energy: The Sun is a great source of energy that allows generating large amounts of it, being totally clean.
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