Beijing saw another "blue sky"day on saturday with the olympics games less than a week away.
The average air pollution index rose to 34 from 28 on friday,but was still "LEVEL I"or "EXCELLENT" .till saturday the city had registered 151 "blue sky"days,or days with fairly good air quality ,18 days more than in the corresponding period last year.The air quality in the olympics host city has been a major concern for some athletes and media organization..
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