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Artist: Giant Air Purifier Aims to Raise Smog Awareness in China

A Dutch artist opened what he calls the world's largest air purifier in Beijing on Thursday, beginning the first leg of a China tour to raise awareness of environmental problems. The seven-meter-high (7.66-yard-high) Smog Free Tower, part of the Smog Free Project started by artist and innovator Daan Roosegaarde, creates a "bubble of clean air enabling citizens to experience clean air for free," according to his website. The tower captures and collects more than 75 percent...

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