
A 100-meter-tall air purification tower in Xi’an, China – believed to be the world’s largest air purifier – has significantly improved city air quality, results from its preliminary run suggest.
According to researchers from the Institute of Earth Environment at the Chinese Academy of Sciences, the tower has managed to produce more than 10 million cubic metres (353 million cubic feet) of clean air per day since it was launched a few months ago. In the 10-square-kilometer (3.86-square-mile) observed area of the city, smog ratings have been reduced to moderate levels even on severely polluted days, an improvement over the city’s previous hazardous conditions.






















