A smog-filtering tower developed by Chinese scientists at the Institute of Earth Environment under the Chinese Academy of Sciences has been built in Xi’an, northwest China’s Shaanxi Province, and is in the trial phase.

The tower, which is 60 meters high and 10 meters in diameter, was built in Chang’an District, and is a key experimental project of the institute.

According to the institute, the tower is coated in glass and has a heat collector and a draught fan, which is all designed to help filter air and improve the purification efficiency.

An on-site employee said that the smog-fighting tower has really helped to improve the air quality, according to initial tests, but did not disclose further details.