The air quality in Hong Kong is one of the worst in the world, however a large percentage of the smog in Hong Kong comes from coal-fired power plants located in mainland China.
Because of the pollution from China, Hong Kong residents bear the conaequences from the smog. It isnt uncommon to walk through Hong Kong and see people wearing masks as a sort of filtering device. During the days when China increases the output of its coal powered power plants and the wind blows South, the smog in Hong Kong is considerably as can be seen during the morning cnn broadcasts.
As a result of the air pollution, cardiovascular health issues have increase, and more money is spent on medical care. Even stock investors are beginning to be repelled by the pollution in Hong Kong.
The relationship between China and Hong Kong is a good example of a transnational pollution event.
