about geography

1. Hong Kong's air pollution comes from traffic in Hong Kong and the air pollutant from China.
2. The air pollution in Hong Kong worse in winter because the air blown from the north to the south because of offshore wind. The pollutant blown from China to hong Kong through the offshore wind.
3. The impact of air pollutant is that it will affect the people's impression to Hong Kong. Also it will affect people health especially the respiratory system.
4. There are many ways to improve Hong Kong's air quality. For example, people should use more public transport. Turn off the engine when they parked the car. The industry in Hong Kong should lessen the air pollutant produced by the factory although there is less industry in Hong Kong.