View of the filter screen of a 60-meter-tall air purification tower, the world's biggest air purifier, to combat smog and other air pollution in Xi'an Stock Photo - Alamy

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View of the filter screen of a 60-meter-tall air purification tower, the world's biggest air purifier, to combat smog and other air pollution in Xi'an

Watch: World's biggest air purifier on trial run in Xi'an

AIR PURIFIER IN XI'AN, CHINA - Antarctica Journal

World's first smog filtering tower goes on tour

Air purification towers in China, a-b) Air Purifier in Xi'an, c

Watch: World's biggest air purifier on trial run in Xi'an

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World's largest air purifier makes debut in China

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A view of a 60-meter-tall air purification tower, the world's

This skyscraper-sized air purifier is the world's tallest