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1 Background
The global warming caused by greenhouse effect has become an important issue which humanity is facing. This issue is also the great challenges which humanity is facing in the 21st century. For a long time, scientists have always thought that carbon dioxide gas is the culprit which causes global warming. The carbon dioxide gas is produced by excessive burning of coal, oil and natural gas of a modern industrial society. However, the British Institute of the University of York Situo Ge Gilmore recently published a research report that the airline industry is another culprit of global warming (Xu Anjie，2008)............

2 The environmental pollution problems caused by the aviation industry
2.1 The aviation industry is one of the heavily polluted industries
2.2 Aircraft cloud is another culprit of global warming
3 The initiatives of term paper定制 controlling air pollution
3.1 Airlines improve efficiency in the use
3.2 Aircraft industries developed bio-fuels and reduce carbon dioxide emissions
3.3 Aircraft industries develop new materials and reduce the weight of the aircraft itself
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Reference
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2. Aline León, 2008. Hydrogen Technology: Mobile and Portable Applications. New Mexico: Springer press.
3. Antonino Furfari, 2008. Biofuels: illusion or reality? The European experience Editions. Korea: TECHNIP press.
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12. Roland Conrady, 2010. Trends and Issues in Global Tourism 2010. New Mexico: Springer press. 13. Wang Qing, 2009. Bio-fuels lead the aviation industry a green future. https://financewww.51lunwen.org.sina.com.cn/leadership/mroll/20091229/16057170530.shtml.[accessed on 09/10/2009] 14. Xu Anjie, 2008. Aircraft emissions cause global warming more easily. Global Times.14th July.
15. Xinhua, 2009. Hong Kong Li generals will develop a new nano-materials which can be widely used by reducing the aircraft weight. https://news.xinhuanet.com/gangao/2009-04/03/content_11124865.htm. [accessed 3/24/2009]
16. Yang Shuai, 2007. Climate Change 2007-Mitigation of Climate Change: Working Group III Contribution to the Fourth Assessment Report of the IPCC. England: Cambridge University Press.

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