In summer, wind blow from south to east, there is low pressure on land and high pressure on sea, onshore wind from Central China and in winter, wind blow from north to west, serious air pollution in Tung Chung due to monsoon wind. As there is high pressure on land and low pressure on sea, offshore wind from Central China to Pacific Ocean blows air pollutants emitted by industries, power stations and vehicles from South China to Tung Chung.
Secondly, another cause is human factors.
The major developments on Lantau Island at present are the Hong Disneyland and Hong Kong International Airport at Chek Lap Kok, AsiaWorld-Expo and power station in Penny’s Bay. First, combustion of fossil fuels from the airplanes at the Airport worsens the air quality in Tung Chung. Second, busy vehicular flow to the airport, AsiaWorld-Expo and Hong Kong Disneyland and emits air pollutants.
Third, fireworks at Hong Kong Disneyland produce air pollutants which are blown to Tung Chung by wind.
Last, air pollutants also emitted from the Penny’s Bay Power Station. The major development project on Lantau Island in the future includes the Hong Kong-Zhuhai-Macau Bridge. The commercial work and the busy vehicular flow after their completion will further produce more air pollution. The air quality in Tung Chung is likely to be worsened in future.
Rapid economic development in South China results in serious air pollution in Tung Chung. As more industries are relocated from Hong Kong to South China due to lower production cost, there is a rapid cross-border flow of goods and people between Hong Kong and South China. There are some type of air pollutants: Carbon oxides, Carbon monoxide, Carbon dioxide and Sulfur dioxide. In conclusion, the air quality of Tung Chung is poor. Physical and human factors are the causes of air pollution in Tung Chung.