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September 30, 2016 08:00 pm

The Smog-Sucking Tower Has Arrived in China

Jamie Fullerton, reporting for Motherboard:Daan Roosegaarde reached into the pocket of his suit jacket, pulled out a plastic bag filled with black powder, and waved it around. "This is Beijing smog," Roosegaarde said, before gesturing to the seven-metre tall, gently humming metal tower we are stood next to in the Chinese capital's art district, 798. "We collected it from the tower yesterday. Incredibly disgusting." Dutch designer Roosegaarde's smog souvenir may be disgusting, but it's the byproduct of an invention that he has touted as a potential alleviator of China's pollution problems. His "smog-free tower" sucks air, filters it with ion technology, with Roosegaarde having explained: "By charging the Smog Free Tower with a small positive current, an electrode will send positive ions into the air. These ions will attach themselves to fine dust particles. A negatively charged surface -- the counter electrode -- will then draw the positive ions in, together with the fine dust particles. The fine dust "is collected together with the ions and stored inside of the tower." With the dust collected, the tower then spews out cleaner air through vents, creating a "bubble" in the area surrounding it that contains, according to Roosegaarde, up to 70 percent fewer pollution particles than the pre-cleaned air.

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