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Thread: Bei Jing , PM2 1000
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[quote=DAVIDLU,488310]the normal value of PM2 is 75. It is said in the news , morn than 1 million kilometers of the area can't reach to that value. the Pearl River Delta and Yangtze River Delta are the harder-hit area.Coal power generation and vehicle exhaust are the main factors. In most cities, the gasoline used in the vehicles has only one fifteenth to international standard.Some expert suggest, for example, limit the vehicles on the road at Beijing. That is not a fundamental method. Tokyo has more vehicles but the PM2 is much better. [/quote]
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