Expository Text on Global Warming

Expository Text on Global Warming

It is known as global warming to a phenomenon on a planetary scale, which consists of the gradual increase in temperatures of the layers of the atmosphere closest to the surface of the Earth, which brings about important changes in climatic cycles and in the composition of terrestrial chemistry, and consequently, in the very dynamics of the life.

Global warming, also called climate change, began to be a concern for humanity in the mid-20th century, when it became clear that the accumulation in the atmosphere of gases rich in carbon, mainly carbon dioxide (CO₂) and methane (CH₄), produce the so-called “greenhouse effect”: they absorb and retain the infrared radiation emitted by the Sun and accumulate that Energy in the form of atmospheric heat. These gases are among the main air pollutants of our contemporary life model.

Is humanity responsible for global warming?

Although climate change has occurred numerous times in Earth's geological history (alternating ice ages and tropical eras), it never did so with the dizzying speed that has shown since the end of the 19th century until today, something that coincides with the beginning of the global industrialization of societies human. And that is why the world scientific community considers "extremely probable" that these abnormal warming margins are our responsibility as

species.

The first records of the increase in atmospheric heat date from the mid-nineteenth century, and from 1880 to today record a total increase of 0.8 ° C in the global mean temperature, at a rate that multiplied throughout the 20th century, increasing each decade between 0.13 and 0.22 ° C.

To date, 2014 has been the worst year on record. And although these isolated figures may seem like a small thing, it is estimated that a total increase of just 1.5 ° C in global temperature would bring catastrophic biological consequences, and a total rise above 2 ° C would make the warming process now completely irreversible, at least in human times.

The consequences of global warming have a direct impact on life on the planet as we know it. A higher global temperature causes the melting of the poles and eternal snows on the mountain tops, increasing the levels of water and atmospheric humidity.

This not only means that many coastal cities will be flooded by the oceans, which is serious in itself, but also that we will have a more global climate system. chaotic and extreme: colder winters and hotter summers at the same time, torrential rainfall and / or prolonged droughts, in short, a more unpredictable and inhospitable.

Furthermore, the economic and humanitarian consequences of this would be unpredictable and possibly catastrophic, such as the expansion of deserts subtropics and the reduction of arable land, or the deoxygenation of the oceans, which would end their great biodiversity. And given the latency of greenhouse gases in the atmosphere, this situation could last for tens of thousands of years.

What is the solution for global warming?

The solutions to this problem are not simple. A reduction in greenhouse gas emissions from human activity also implies a reduction in the production and generation of energy, which is incompatible with our economic and consumption model in the present.

A decrease of around 80% of the current production of carbon dioxide is required to slow down global warming in time to more or less preserve our living standards.

The great global powers have begun, albeit slowly, the process of adjusting their respective economies towards a “green” or “sustainable” model, and the year 2050 has been set as the limit to carry out this transition.

What is an expository text?

An expository text is a type of writing whose essential mission is to provide the reader, in an objective way, specific and specific information on a specific topic. In this it differs from other textual types, such as argumentative text or the narrative text, since the expository text does not contain or arguments or opinions in favor of a perspective, nor any kind of story or narration.

Expository texts focus above all on information, so they are usually dispassionate and impersonal and more or less rigorous in their approach to the subject. They are texts in which data, observations, textual citations and other resources predominate in order, as the name implies, to expose the reader to an aspect of reality.

To write an expository text we must first of all document ourselves on the desired topic and then reproduce the ideas, of the most general to the most specific (or vice versa), without involving our own points of view on the matter, but adhering to the strictly informative.

References:

• "Expository text" in Wikipedia.
• "Global warming" in Wikipedia.
• "The expository text and its functions" in ar.
• "What is global warming?" on National Geographic.
• "Global Warming (Earth science)" in The Encyclopaedia Britannica.

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