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PM2.5 used in weather alert system
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China.org.cn, January 29, 2013
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Heavy fog blankets the buildings in Beijing, capital of China, Jan. 29, 2013.
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PM2.5 used in weather alert system
The National Meteorological Center has introduced a new weather warning system for smog which will use readings of PM2.5, as thick haze chokes many cities in the past week.
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Air pollution: Top concern in Beijing
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In pictures:
Outdoor workers on a foggy day
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