The moving pollution sources control
Current Situation
Mobile pollution sources, being primarily car and motorcycle, are able to move from place to place without external forces and emit physical or chemical pollutants as a by product. Some of the emitted pollutants are suspended particles, CO, CHx, NOx, lead and SOx etc. Those pollutants not only have an ill effect on human health, emission such as NOx and CHx are also related to the formation of photochemical gases and ozone.
The characteristics and effects on human health of each air pollutant are as follows:
- Vehicle emissions are not only hazardous to human health, it is also damaging to other animal and plants. For example, the black soot emitted from diesel vehicles will stain cloth, building and have an impact on the scenery. It may also become corrosive when combined with other pollutants in chemical reaction. This black soot will also block lights and scatter to reduce the visibility in the air.
- Ozone on the other hand is very damaging to plants. It will reduce crop harvest and damage trees and forest, it can also induce cracks in rubber leading to breakage. High SO2, NO2 concentration in the air will result in the formation of acid rain, which will also have a detrimental effect on the growth of plants.
According to the monthly statistic on registered mobile vehicle from the Ministry of Transport, there are 388,870 registered mobile vehicles in this county by the end of December 2004, of which 123,389 vehicles are petrol and diesel car; the rest 265,481 vehicles are motorcycles which consist of a staggering 68.3% of total registered vehicles in this county. Thus we need to pay attention to monitoring and controlling emissions from motor vehicles.
