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    My hometown is Hong Kong. It is a place where is suffered from serious pollution. However, the most serious pollution is air pollution. In this essay, I am going to explain why the air pollution is serious in Hong Kong and also account for the reason for choosing to change the air condition of Hong Kong.

    Having fresh air in Hong Kong is good for Hong Kong citizens. Hong Kong is one of the most densely populated countries in the world. There are many people and cars on the streets. Due to a large amount of people, the transportation system in Hong Kong is very advanced. There are especially many public transports on the street and therefore greatly pollute the air. Furthermore, as there are many people living in Hong Kong, most of the places are used to build houses. As a result, there are very few parks where trees and flowers can be planted inside. Since trees and flowers can carry out photosynthesis and filter the air by absorbing carbon dioxide and giving out oxygen, so the air condition in Hong Kong is greatly polluted.

    As the air pollution in Hong Kong is serious, most of the people are suffering from respiratory disease. With the bad air condition, the people have large chance to have serious respiratory disease such as asthma. Apart from this, the poor air condition also affects tourism. Since the tourist want to have relaxation in holiday, they surely not to choose Hong Kong as it will harm their health.

     To conclude, as the result of the air pollution is considerable and worrying, it both affects the health of the citizens and the tourism. So we should pay more effort to protect our hometown and prevent it from pollution.