Global Warming

Nom : Ikram Ait zouli

Class : 1Bac science economie gestion 

                                                                                    

Global Warming

1_Definition of global Warming :

 Global Warming is a rise in the temperature of the lower layer near the Earth's surface and close to the atmosphere surrounding the Earth. The reason for this increase is the increase in greenhouse gas emissions, or so-called greenhouse gases. The most prominent of these gases is methane, which is formed mainly from the microbial reactions that occur from the raising of ruminants and rice fields. In addition to this gas there are other gases, such as nirose oxide gas, which is formed from the microbial reaction group in soil and water, and chlorofluorocarbons, which form a layer in the layer Ozone, apart from the ozone gas that forms within the lower atmosphere.

2_Causes of Global Warming :

The causes of global warming can be summarized as follows: [5] [6] Changes in the Earth's orbit around the Sun: It results in a change in the amount of solar radiation reaching the Earth, a factor that is very important in climate change. Volcanic eruptions: Volcanic eruptions cause large amounts of dust and gases. These gases emit sulfur dioxide. Its negative effect is that it stays in the atmosphere for long periods of time, blocking the sun's rays. The minutes of dust emitted affect the equilibrium of the atmosphere. Earth temperature. Gases from organic pollutants: These pollutants include livestock waste, especially cattle, sheep and chickens. Air Pollution: Air pollution contributes to the flow of large amounts of greenhouse gases into the atmosphere, which increases their proportion in the atmosphere. Ozone depletion: The ozone layer is defined as an atmosphere in the atmosphere containing ozone gas and protects the earth from harmful ultraviolet radiation from the sun. The depletion of this layer is effective in causing global warming; gases emitted from industries, including CFCs, interact with a layer Ozone has holes in them, and the introduction of harmful gases to the ground through these holes, which leads to the obstruction, and global warming. Deforestation: Deforestation reduces oxygen in the atmosphere and increases the proportion of carbon dioxide that plants benefit from photosynthesis. Industrial progress: Fuel combustion results in very large amounts of greenhouse gases, such as: carbon dioxide, which absorbs infrared radiation and traps it on the ground, as well as many harmful gases emitted into the air; it mixes with other gases in the atmosphere , Forming toxic compounds that may damage the human respiratory system. The use of chemical fertilizers: Chemical fertilizers are one of the most important factors in global warming because they contain several compounds that contribute to the phenomenon of greenhouse gases, such as: nitrogen oxides, which cause many holes in the ozone layer, and thus enter harmful ultraviolet rays to the earth through these holes; The temperature rises.

3_Global warming results :

 in a hole in the ozone layer that provides protection to the Earth from harmful sunlight, such as UV rays. The occurrence of acid rain, which pollutes water, harms humans, plants, and the whole ecosystem. Melting of ice and rising sea and ocean levels, and thus the sinking of low islands and coastal cities. Increase floods, hurricanes and storms. Drought, desertification of large tracts of land and increased forest fires. Spread of epidemics and infectious diseases. Extinction of many organisms. Lack of drinking water and famine. Natural climate change in the world

4_Global warming solutions :

The easiest way to address global warming is to raise people's awareness, by holding seminars and lectures, for example, by reducing energy consumption and reducing the operation of plants. The most effective solution is to develop energy production technology so that fuel use is reduced in production. For example, the automobile industry, which has developed in the manufacture of turbo engines, has been significantly improved engine efficiency. To reduce gas use, some also use renewable energy such as solar, photovoltaic, and wind energy to move windmills.