It is reported that Beijing's enactment of the air pollution emergency plan of Beijing municipality, according to the different levels of pollution, will take a different response. Which, in the case of severe contamination, the motor vehicles in Beijing will be danshuanghao the limit line, limited rows programme be told one day in advance. This news raises everyone's arguments, after all, the air flow is complex, often the day before is still clear blue skies, the next day it becomes a gray haze. No little difficulty of such cases in advance. And we worry more and do not want to see is that danshuanghao once implemented, it will be normalized?
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