Xian in Shaanxi province has some of the worst air quality in China. Photo: AFP

China’s Xian chokes on smog specks ‘harder than steel’

Researchers in pollution-prone Xian test the properties of the city’s bad air but health specialists say the bigger concern is just how small the particles are

Topic |   China pollution

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Xian in Shaanxi province has some of the worst air quality in China. Photo: AFP
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