What is a Climate change?

Drought is one of the causes of climate change

what is a climate change?

The increase in the surface temperature in 
the world, with the increase in the amount of carbon dioxide, methane and some other gases, is called (global warming), and these gases are also called the term (greenhouse gases), because they help to warm the surface of the Earth as.
 The Earth’s temperature today, is almost double the temperature 200 years ago, and the environmental model, summarized in the report of the Intergovernmental Panel on Climate Change, indicated that the global surface temperature, will likely increase by (1.1 to 6.4 degrees Celsius), during the current century. 
The term global warming, was coined by the Swedish chemist Svante Arinos in the year 1896, and Arinos launched the theory that burning fossil fuels, will increase the amounts of carbon dioxide in the atmosphere, and that it will lead to an increase in global temperatures, and he concluded that if the concentration of carbon dioxide doubled In the atmosphere, we will witness a rise in temperatures at a rate (4 to 5 degrees Celsius), and this is what scientists expect today (1). Scientists were divided about the causes of global warming, some of them said that the phenomenon, is natural and that the Earth’s climate naturally witnesses hot and cold periods, citing the glacial period that the European continent passed through between the seventeenth and eighteenth centuries.
 and another group of scientists, says that the phenomenon is a The accumulation of greenhouse gases in the layers of the Earth’s atmosphere, and they attribute the causes to either natural causes, such as volcanoes, forest fires, the movement of the earth around the sun, and the resulting change in the amount of solar radiation, and the number of hours of sunshine, or industrial as a result of the action and the increasing human activities on The surface of the earth, especially the combustion of fuels (oil - gas - coal ... etc.), and the cutting of trees, and plants that absorb carbon dioxide in the process of photosynthesis necessary for their growth, and release the oxygen gas necessary for life. When the sun's rays fall on the surface of the earth, the earth absorbs part of these rays, and part of it is reflected to outer space, where the greenhouse gases absorb them.
 The need for the atmosphere to maintain a constant temperature on the surface of the earth and leads,  to an icrease in the temperature of the earth's atmosphere.(2)

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