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From Latin petrolĕum, which in turn derives from a Greek word that means "Rock oil" , he Petroleum is a oleaginous natural liquid which is formed by a hydrocarbon mixture . It is obtained from geological beds, whether continental or maritime.

Specifically we can also clarify that oil, known in the same way by the name of crude oil, is generated in what would be the interior of the Earth. Other of its most significant characteristics is that it can be black or yellow and has a viscosity that can reach 95 g / ml.

Oil is flammable and, from different distillation and refining processes, it allows to produce naphtha , diesel oil , kerosene and others products They are used for energy purposes.

The first records on the use of oil date back some 6,000 years ago, when the Assyrians and the Babylonians used it to glue bricks and in the medicine . The Egyptians appealed to oil to grease skins, while the pre-Columbian Indians used it to paint sculptures.

The first distillation of oil would have been carried out in the ninth century when the arab Al-razi obtained kerosene and other distillates for use in medicine and in the military field. From XIX century , oil refining was popularized to obtain fluid oils that could be used in lighting.

In addition to all of the above, the existence of what is known as OPEC (Organization of Petroleum Exporting Countries) must be stressed. It was launched in 1960, currently has its headquarters in Vienna and its main objective is to unify the oil policies of the different nations that are part of it.

At the moment, this entity can say that it is made up of a total of member countries: Saudi Arabia, Iran, Venezuela, Angola, Nigeria, Libya, Iraq, Kuwait, Algeria, Ecuador, United Arab Emirates and Qatar. Before, two other nations were also integrated into it, which are no longer: Indonesia and Gabon.

Oil is a source of Energy non-renewable : This means that, once it runs out, it can no longer be obtained under any circumstances. Statistics speak that, if the current rate of extraction is maintained and without new deposits being found, world oil reserves will be depleted in less than fifty years.

Although this would be a serious problem for the Humanity The truth is that oil is a polluting material (its combustion produces CO2, for example) and difficult to clean since it is insoluble in water.

It is interesting to highlight the fact that there are expressions that use the word petroleum in its formation. A clear example of this is the oil well, which is that drilling that takes place in the ground to find the aforementioned mixture.

We cannot also ignore the existence of colloquial expressions that make use of the term we are analyzing. This would be the case of the verbal phrase sweat oil. With it, what is said is that someone is having important problems, especially of an economic nature.

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