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is because this is where the most powerful winds are located. The greater the difference in pressure the more powerful and destructive the eye wall becomes. Therefore; the best way to reduce the degree of disaster is to predict the hurricane in time so as to decrease the numbers of victims and lessen the losses of homes or whatever.

As more and more people began to keep a watchful eye on hurricane Katrina after the disaster in 2005, the studies on the hurricane Katrina raise too much attention from the experts in different aspects. Among them, some environmentalists brought up the notion that the hurricane Katrina was caused by global warming. They note an increase in the number of observed hurricanes in the North Atlantic over the past century, concluding "increasing cyclone numbers has lead to a distinct trend in the number of major hurricanes and one that is clearly associated with greenhouse warming". It is no doubt that the global warming is the second cause for the hurricane Katrina of 2005.

Global warming not only causes the rising of average temperature of Earth's atmosphere and oceans, meanwhile it also causes sea levels to rise and change the amount of precipitation. Global warming and its relating changes vary from region to region around the globe. While the causes for global warming lies in the fact of our human behavior. With the booming of our economy, the emission of the green house gas which consisting of about seventy percent of carbon dioxide has been increased steadily, which contributes greatly to the global warming. The pollution is the main reasons for the causes of global warming, for examples, more and more people buy cars create the great amount of gas. Even some people destroy the forest to make money. These are all man-made causes for global warming.

From the above mentioned, we know that there are two main causes for hurricane Katrina: the natural disaster and human-being damage. Although the disaster of Hurricane Katrina of 2005 had been a part of history, however we should realize the importance of respecting the mature and protecting our living environment all the time.

 

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