Portfolio 6

Source: The following passage is excerpted from online article. It was published online by the BBC News on November 9, 1998. The title of the article is “Global Warming: The Fact.” The Web site address is http://news.bbc.co.uk/2/hi/special_report/1998/10/98/global_warming/202408.stm

Summary

Nowadays, the existence of global warming cannot be denied. Scientists have shown strong evidence to support that global warming is indeed occurring. The obvious evidence is the dramatically rising of surface air temperature. Scientists have proved that 1998 is the hottest year in the last thousand years. Besides, the ice caps have melted and the global sea level has risen by between 10cm and 25cm over the last century(BBC News, 1998). Most scientists believe that greenhouse effect is one of the factors, which directly encourage the global warming. Human activities have influence on the concentration of carbon dioxide in the atmosphere too. Carbon dioxides is the main greenhouse gas which causes the climate changes. Global warming has brought catastrophic effects to human and plants. It causes more natural disasters occur. What can be done by the human to reduce the impacts of global warming? For instance, using low carbon fossil fuels, developing green and renewable energy sources, planting new trees and sustaining existing forest cover can reduce the human impacts on the climate change. However, the pollution we caused today will not cause the climate change immediately, it will cause the climate change after 30 years.




References

BBC News. (1998, November 9). Retrieved November 9, 2008, from
http://news.bbc.co.uk/2/hi/special_report/1998/10/98/global_warming/202408.stm