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发帖数: 10330 | 1 http://www.chinadaily.com.cn/photo/2013-12/06/content_17157352.
Heavy smog seeps into Shanghai Hongqiao International Airport on the evening
of Dec 5, 2013. Air Quality Index (AQI), which measure PM2.5 particulates,
topped 400 on Friday morning in Shanghai, meaning the city was "severely
polluted"- the highest level on the air pollution scale - for the second
time in a week. [Photo/icpress.cn] |
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