Cloning has been a very sensitive topic and there has been controversy for many years. In my opinion, there are many advantages and disadvantages of cloning. One benefit of cloning is shown through the future of the medical field to improve our level of science technology. For example, we all know that heart disease has been a high incidence of the disease. But now scientists predict that in the near future they will be able to clone healthy heart cells and inject them into damaged areas. Technology like this is obviously in great need.Second, cloning can improve the gene and the quality of life. We can use cloning technology to clone excellent things and improve plant traits, such as a number of good quality cattle, sheep and pigs and so on. We can also clone cows which are high milk production.http://www.tigang.net/Even though there are a lot of benefits , there are also a lot of disadvantages of cloning. For example, there are many people to envisage the possibility of human cloning. They think this allows the humans cloned to do what their owners’ do not want to do and the owners can have more time to rest and relax. What l want to say is cloning technology should be to the benefit of mankind, rather than add more to the human trouble.