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Activity 2 feedback

13 March, 2015 - 11:41
  1. Air pollutants from forest fire contribute most to natural air pollution in Hong Kong. However, due to dust storms in Mainland China, we have recorded higher amounts of small size dust particles in winter. Salt particulates can be a minor problem in the foggy season (Feb-May) of Hong Kong.
  2. Nowadays, emitted nitrogen oxides (NOx) are the most difficult to control since most of them are from vehicles which travel on roads and highways of Hong Kong (i.e. distributed sources and distributed emission hours in the day). Furthermore, emitted pollutants from transportation often react with sunlight and organic radicals to form ozone.