Stone statues, mostly lions, wear masks as a symbol of air pollution in Xian, China draws attention to the online community of this country.

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Stone statues are all covered with masks.Tieu Ly, a male student participating in this work, said he and his friends wanted people to act together for a less polluted atmosphere.

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PM 2.5 dust index (dust suspended in the air, 2.5 micrometers in size) in Xi'an, China exceeded the permissible level many times, making the sky always "fog".

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Air Quality Index (AQI) in Xi'an in the past few days at 168, an alarming level.

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Coal kilns are used extensively in China in the winter, the sky is always gray due to pollution.Students in Xi'an think that wearing a mask for stone statues is one of the ways to influence the sense of community in protecting the environment.

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Stone statues in many different poses are worn with masks.

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The students said they spent about a few dozen yuan to wear enough 800 masks for the stone statues.

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Last weekend, Chengdu capital residents, Sichuan province, China wore a demonstration mask protesting the air pollution.Chinese riot police then lifted the protest.