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GLOBAL WARMING - Global Threat

Climate Change

In the history the earth had always alternated periods of cooling and heating. These changes have always occurred in a very long time allowing life forms to adapt. What is alarming it is the increase of the average temperature over the last 140 years. The increase ranges between 0.3 ° C and 0.6 ° C. But in the polar areas the temperature is raised from 2 ° C to 4 ° C. The temperature rise relates vast areas of the African continent where they aggravate the problems of drought. The variety of climates land depends on the different Sun irradiation they are exposed to the various countries of the earth. The energy from the Sun reaches the same way all the countries of the earth due to the different angle of the Sun's rays. Even volcanic eruptions affect climate change. Large amounts of ash erupted reduce the absorption of solar radiation that fail to reach the ground. According to scientists the natural causes alone are not enough to explain climate change in progress. According to the organisation that deals with climate change in the atmosphere proved to be a strong increase in the concentration of carbon dioxide is a major greenhouse gas. Greenhouse gases are essential for life on earth and without them our planet would have a lower temperature of 33 ° C (91,4 ° F) than at present because they keep part of the solar heat that would be lost without them. These gases are present in the atmosphere in a percentage of about 0.1%. However, if the concentration of greenhouse gases in the atmosphere exceeds the natural levels an excessive amount of heat is retained and temperature increases in the atmosphere. A sign to the increasing temperature is the shrinking glaciers all over the world. For 50 years, not only the Alps and the Andes but also the Himalayas show a worrying melting of glaciers, which have been reduced by more than 20%. To understand the severity of this fact is enough to consider that arise from the Himalayas well 9 rivers that feed from the standpoint of water more than 40% of the world population. A drop of their flow could have dire consequences for the peoples of Asia. The melting of glaciers leads to an increase in the level of coastal seas forcing the population to move inland. At risk are the delta of the Nile and the Ganges and several islands of the Indian and Pacific Oceans. The temperature rise affects the delicate balance determines climate and extreme weather events such as hurricanes and destructive typhoons or prolonged periods of drought as one of the causes of the desertification process and the total loss of soil fertility and its transformation into a desert. The increase in temperature could have disastrous consequences for northern Europe where the climate is tempered by the influence of the Gulf Stream. The entry in the sea of ​​increasing amounts of fresh water from the melting ice of the North Pole could have a catastrophic manner on the Gulf Stream and consequently the European region would find themselves in the grip of frost. The increase in temperature also affects ecosystems balance endangering the biodiversity that is, the diversity of species in a given ecosystem. The high concentration of greenhouse gases such as carbon dioxide or methane is a direct result of human activities. Over the past two centuries the great development of industry and the growth of automobile traffic and heating systems have resulted in an increasing use of energy coming mostly from fossil fuels such as coal oil and natural gas. Just fossil fuels, in particular coal enter large amounts of carbon dioxide in the air. Human responsibility is aggravated when one considers that in order to satisfy the growing need for land to cultivate, the man did not hesitate to deforested large areas of the planet by reducing the extent of forests and woodlands which have a fundamental role in the absorption of carbon dioxide. The planetary climate crisis deserves a joint effort by all countries of the world. First of all industrialised countries that have been and are still the major contributor to air pollution and global warming. However, the greenhouse gas emissions today comes also from emerging countries such as India and Brazil, but especially China. They shall be required not to make the same mistakes of the industrialised countries, however, there is the problem of financially aiding so these countries will use clean energy and limit the use of fossil fuels. We compare two planets in our solar system, Earth and Venus: the 2 celestial bodies have nearly identical dimensions and an almost equal amount of carbon. The difference is that on the Earth the majority of this carbon is below ground while on Venus the majority of the carbon is in the atmosphere. The result is that while the average temperature on the earth equivalent to a pleasant 15 degrees Celsius (59° F) on Venus squirts the same to 464 degrees Celsius (867° F) . Of course, Venus is closer to the Sun but is not the fault of our Astro: Venus is on average three times hotter than Mercury the closest planet to the Sun ever. The fault is from carbon dioxide. This threat requires us to unite in the knowledge that the climate crisis can be resolved in time to prevent the catastrophe.

Attempts to contain the problem

In recent years there has been much discussion on the problem of global warming; television news, various television programs, movies show us what is happening to our planet and what might happen in the future with catastrophic consequences. Governments around the world are trying to find a remedy to prevent this or to do so to reduce it, but it seems that not all states have agreed to reduce emissions of the gases in the atmosphere, for various reasons. Global warming is a phenomenon caused by increasing emissions of carbon dioxide and other gases thus warming the atmosphere, giving rise to the so-called “greenhouse effect”. All this leads to a rise in temperatures that, over the years, the huge glaciers could melt the North Pole, with a consequent increase in the sea level, which would lead to severe flooding in many countries and the disappearance of many islands. From the economic point of view the damage could be incalculable, so as to bring down even the richer countries, while others already living in poverty will pay the highest price. In fact, Africa where 70% of the population depends on agriculture, global warming is giving a sharp accelerated to the desertification process, so that efforts are being made to eliminate hunger in the continent will prove vain. One of the topics discussed at the meeting of the G8 in July last year to Greneagles in Scotland has been the problem of global warming of the atmosphere. According to experts, in recent years it seems that the heating process is accelerated, the polar ice caps continue to melt and huge chunks of ice break off from the immense ice sheets, the consequences of melting glaciers could be devastating. In 1997 in Kyoto, Japan 141 countries have signed an international treaty for the subscription of greenhouse gases. The commitment made by industrialised countries signatories included the reduction of at least 5% of greenhouse gas emissions compared to 1990 levels. This represents an important step forward in the fight against global warming because it contains binding targets and quantifying limitation and reduction of greenhouse gases. In 2005, the Kyoto Protocol entered into force but the U.S. and China (they are among the world's largest producers of greenhouse gases) not signed it. In December 2009, representatives of 192 states met in Copenhagen for the world climate conference. Two priority objectives to find an agreement to reduce greenhouse gas emissions and raising funds to finance the use of clean energy in developing countries. Now I want to talk about Al Gore in 2007 he received the Nobel Prize for Peace for his commitment to protecting the environment. Al Gore was vice president of the United States during the presidency of Bill Clinton. In 2006 he took part as a protagonist in the movie Inconvenient Truth, in which he explains the dangers of global warming. In his speech on the occasion of the awarding of the prize, Al Gore urges men to join before the emergency of global warming. According to Al Gore our earth is in danger. Without realising the consequences we began to pour amount of carbon dioxide such as to alter the reach thermal equilibrium between the Earth and the Sun. We have extracted from the soil increasing amounts of carbon, burning at the rate of 70 tons of carbon dioxide poured every 24 hours in the atmosphere. According to Al Gore what we face is not a political issue, it is a moral issue. Personally I hope to be given greater importance to this phenomenon, I hope that all states of the world will join in the future looking for a strategy to reduce or slow down this process. For our part, as citizens, we could help to reduce the global emission of greenhouse gases, for example by changing the lifestyle, it is important to avoid waste, such as the use of cars for driving short distances, perhaps using a bicycle, and why not arrange car-free days. Important also seems to me the choice of low consumption and use solar energy, because the installation of solar panels would reduce C02 emissions and produce clean energy. These are just some of the many things that could be done and helping all together it could reduce the progressive increase of this phenomenon.


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