the change of world climate and energy
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Global climate change and energy
The Earth's atmosphere consists mainly of nitrogen (78%) and oxygen (21%). And the remaining 1% is argon. These gases are transparent and allow the passage of solar radiation to heat the earth's surface. The land and ocean hot in turn heats the atmosphere low. And radiate some of this heat into space again.
If this is all what happens to the rate of temperature -18 ° Q instead of 15 degrees Celsius (59 Fahrenheit) as it is now. The reason for the overheating that there are gases in the atmosphere absorbs the energy before it is dispersed in space and then slowly and fired again into the atmosphere.
Since 99.9% of the atmosphere consists of nitrogen, oxygen and argon remains an area of very few of the other gases. However, even small quantities of greenhouse gases have a significant impact on the climate.
Two factors determine the effect caused by a greenhouse gas alone. First, there is (factor of global warming) for the gas. Any ability to absorb and release heat Later (Global warming Factor-GWF). The number given to this factor is "1" for carbon dioxide, a figure that is given arbitrarily.
The values of other gases indicate their effectiveness in comparison with carbon .The second factor is the amount of gas in the atmosphere.
Although I consider carbon dioxide gas is weaker than other greenhouse gases but there are large quantities in the atmosphere, so it has the greatest impact. Factor of global warming parts of the concentration (in billion) Carbon dioxide CO 2 1 379,000Methane - CH4 21 1,760Alentros oxide -N2O 310 320
Chlorofluorocarbons –
CFCs 5,000 to 14,000 less than 1 Parts billionth Carbon dioxide As it is called this gas also from forest fires and volcanoes. Contributes to the human in the production of carbon to the atmosphere by burning wood, coal and petroleum. Methane is produced naturally by bacteria called Mithanoguens which feed on plant material and animal in environments where there is no oxygen. Live bacteria Mithanoguens under stagnant water in swamps, where it produces methane bubbles called "swamp gas" or "gas pools".
These bacteria also live in the digestive systems of animals and help them to convert grass and other organic material to nutrients. Termites also produces a lot of methane. Produces a white ant and one half mg per day and since there are large numbers of ants in this world together produce about 20 million tons annually. It also produces some of the activities of agricultural methane. Valerz for example, grows in the fields submerged most of the time. Stimulate the stagnant water, which covers the soil bacteria Mithanoguens such as those in the marshes. Domestic livestock produce methane more than wild animals. Where one cow produces about 50's of methane a day. Produces cattle and herds in the commercial world, about 100 million tons per year. Nitrous oxide Gas nitrous oxide N2O. Released by ammonium nitrate, used as fertilizer to increase crop on a large scale.
CFCCFCs is a compound of chlorine, fluorine, hydrogen and carbon. It does not consist naturally. This compound has been found for the first time in 1892, but had no known use at the time. And
proved its usefulness as a factor for the later payment in the boxes, CDs, and a refrigerant. But there is a problem. Ozone is a form of oxygen which combine three oxygen atoms in a molecule is O3. Since the form of free molecules of oxygen is O2.Reduce the ozone layer over the penetration of ultraviolet radiation. This radiation is harmful to humans and cause skin cancers and cataracts of the lens of the eye (cataract), they also interfere in the growth and reproduction of other organisms. Therefore, he was denied the use of CFCs under the Treaty of 1987. Although this compound of greenhouse gases is very effective but it is present in trace quantities in the atmosphere. Now, since it may prevent the use and presence will be reduced.
Prepared by: Rahaf Badawi
Second scientific class- Al Kods School
Supervisor: Tonia Bittar- teacher of English
Translated by: Samira Al Ali
Second Secondary class – Al Qassam School
Supervisor: Hassan Al Mohammad