So Haikou cities in the world ranking of five air quality, the development of a city life to some basic elements of control, we know that one water and two thirds of the city is water.

• 所以海口在全世界城市中空气质量排名第五，一个城市生活发展有一些基本的要素要控制，我们知道一个是水，有三分之二的城市是缺水的。