Explain possible natural and anthropogenic factors that affect global climate change. Which do you think are more significant in explaining major climate change?

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Global climate change refers to long term changes in the world climate, namely increasing world temperatures. Over the past thirty years, concepts of man made climate change became common thought. It is repeated every day in the media and taught in schools and universities. Many governments and the United Nations believe that Man is causing global climate change and they vow to stop climate change. However, it is impossible to stop climate change. Climate change is a natural process and is caused by the dynamic system of the earth, sun and cosmos. Greenhouse effect is a natural process and allows the earth to retain its heat and support life forms. The sun emits short wave solar radiation that passes readily through the earth’s atmosphere. Some of the radiation are absorbed, reflected or scattered, while the rest reaches the surface and warms the land and the oceans. Because the earth’s surface is cooler than the sun, the earth emits long-wave, largely infra red, terrestrial radiation back to the atmosphere where much is absorbed by greenhouse gases since these gases are more efficient in trapping long wave radiation. Some of the greenhouse gases include water vapour, carbon dioxide, methane, nitrous oxide, chloro-fluoro carbons and ozone. When these gases in the atmosphere absorb terrestrial radiation, they warm, but eventually they radiate this energy away. Some of this long wave terrestrial radiation travels upward, where it may be reabsorbed by other gas molecules. The remainder travels downward and is again absorbed by the earth. Thus, the earth’s surface is being continually supplied with heat from atmosphere as well as from the sun. These processes that take place between the earth’s surfaces will keep the earth average temperature warmer than it would otherwise be. Plate tectonics could also led to climate change. Over the course of millions of

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