The Need of Vitamin C

Vitamin C has many important effects on health. Firstly, it is balances free radicals to help conflict cell and tissue harm. Secondly, it assists the body fight infection in case of illness. Thirdly, it is necessary for both the expectant mother and infant stay healthy for nine months. Fourthly, it is crucial for inner-body repaired. Finally, it is significant in forming collagen that gives structure to bones cartilage, muscle and blood vessels (Hareyan: 2005: 1).

Reference:
          Hareyan, A. (2005). Why do we need vitamin C? [Online]. Available:
                     http://www.emaxhealth.com/76/1144.html  [15 January, 2012].

Climate Change

There are many reasons and results of the climate change needed to understand. Firstly, rising temperatures induce changes in many features of weather. Secondly, levels of the sea are rose because of melting ice and glaciers. Thirdly, changing climate could also affect health and welfare of people (Congondis. 2011 :1-5).

Reference:
          Congondis, D. (2011). Fact about Climate Change. [Online]. Available:
                    http://www.thegreatwarming.com/pdf/ClimateChangeFactsheet.pdf.[2011, August 28].  

Computers under Attack

There are three kinds of virus that cause problem for people who use the computer; Trojan Horse, Spyware, and Spam. Firstly, a Trojan Horse gets credit card feature or bank password. Secondly, a Spyware obscures inside a computer and gathers the data. Finally, a Spam tricks and takes money from people (Philpot, 2011:47).

Reference: Philpot, S. (2011). "Computers under Attack." Academic Skills. Oxford: Spain