A man wearing mask collects dust on a street in Wangjing District of Beijing. The man from Shenzhen has spent 100 days in Beijing collecting smog and eventually compressed the dust into a “brick”. He plans to advocate these blocks as building materials in Beijing. During the 100 days, he carried with him an industrial vacuum cleaner wherever he visited in Beijing. The power of vacuum cleaner can last for four days with every single charge, with a capacity of sucking in the amount of air that 62 people breathe in every day. By doing so, the young man hoped to raise green awareness of the public. (Photo/CFP)
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