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An experimental tower over 100 meters (328 feet) high, built in Xian in Shaanxi province (northern part of China), is now the World’s Largest Air Purifier, bringing noticeable improvement to the air quality in that part of China, according to the scientists leading the project. It is being tested by researchers at the Institute of Earth Environment at the Chinese Academy of Sciences. Cao Junji, head of the research, said improvements in air quality had been observed over an area of 10 square kilometers (3.86 square miles) in the city over the past few months and the tower has managed to produce more than 10 million cubic meters (353 million cubic feet) of clean air a day since its launch. Cao added that on severely polluted days the tower was able to reduce smog close to moderate levels. The system works through greenhouses covering about half the size of a soccer field around the base of the tower. Polluted air is sucked into the glasshouses and heated up by solar energy. The hot air then rises through the tower and passes through multiple layers of cleaning filters. It is definitely the biggest air filter on planet earth, at the moment.  Its presence is desperately needed because Xian experiences heavy pollution in winters, due to much of the city’s heating source being dependent on coal. 

In 2015, the title of World’s Largest Air Purifier went to Netherland’s air purifier filtering Rotterdam’s skyline, below:

Then there is Beijing’s smog-eating tower, largest smog vacuum cleaner in the world in 2017, below:

Daan Roosegaarde, creator of the Smog Free Project, has been finding ways to repurpose the smog by compressing the collected smog into jewelry. Each smog-free ring that’s been repurposed and purchased under this method is essentially donating 1000 cubic meter of clean air to Beijing. Check out the video below and see (toward second half of the video) how young couples are now purchasing these smog-free rings for wedding rings, symbolizing hope for the future. His next project will be creating smog-free bicycles, generating clean air with every pedal. At this point, I’d also like to share some of these wonderful city designs of Daan Roosegaarde, below:

Gathered, written, and posted by Windermere Sun-Susan Sun Nunamaker
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