Nowadays, tourism plays an important part in some countries' economy. It has a lot of adavntages to our life. However, it also has a large number of disadvantages. Firstly, tourism will cause environmental pollution including water pollution, air pollution,....etc, Which may negatively affect residents' life. Secondly, tourist industry can lead to social problems such as violence, increased crime and gambling,....etc. In conclusion, tourism can result in a lot of negative effect on a country