1. 1. The weather in Hunan Province (in Chinese). Available at: http://www.hunan.gov.cn:82/gate/big5/www.hunan.gov.cn/wshn/zrdl/qhqk/
2. 2. China snows show world faces new disasters. Available at: http://english.sina.com/china/1/2008/0207/145226.html
3. 3. China's hand-foot-mouth infections rise to 22,240. Available at: http://english.sina.com/china/1/2008/0508/157677.html
4. 4. Death toll from China's May earthquake remains unchanged at 69,227. Available at: http://news.xinhuanet.com/english/2008-09/25/content_10110269.htm
5. Dread risk, September 11, and fatal traffic accidents;Gigerenzer;Psychological Science,2004