Cause And Effects Of Global Warming

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Global warming has grown up to be a serious problem in today 's earth. The definition of global warming is an increase in the average temperature of the earth 's atmosphere, especially a sustained increase sufficient to result in climatic change. Firstly, there are some people take it as a good thing. But later, scientists realized that it was not good news for human-beings or even the whole earth. Once carbon dioxide in the atmosphere increases 1 time, the average global temperatures will rise 1.5 ~ 4.5 ℃, and the temperature increases in the polar regions are about 3 times higher than the average. There are many factors cause the global warming and the global warming has brought a lot of serious consequences. Therefore people began to attach importance to this phenomenon. Numerous countries and organizations banded together to discuss the countermeasures.
From 1981 to 1990, the global average temperature increased 0.48 ℃ than it was 100 years ago. Over the past one hundred years, the global average temperature has experienced the cold, warm, cold and warm fluctuation. In general, the temperature has increased in the past one hundred years. After entering in 80s, global temperatures rose significantly. The United Nations Intergovernmental Panel on Climate Change released in 2009 the latest observation results, which shows the Greenland Arctic ice melting Bigaoer documentary forecast worse, while the West and East Antarctic ice melting phenomenon appeared for the first time.
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