There’s 100-metre high air purification tower in Xian in Shaanxi province that after a few months of operation is said to be working. The purifier is dubbed “the world’s biggest.”
Testing of the tower is being done by researchers at the Institute of Earth Environment at the Chinese Academy of Sciences. Cao Junji, head of research, said improvements in air quality have been observed for an area of 10 square kilometres (3.86 square miles) and the tower has produced over 10 million cubic metres of clean air a day since its launch. On critically polluted days the tower has reduced smog close to moderate levels.
How does it work?
Greenhouses cover half the size of a soccer field around the base of the tower. Polluted air is filtered into the glasshouses and heated by solar energy. As the air rises through the tower it is filtered by a multi-layer system. The tower works in both warm and cold temperatures and is said to work at a high efficiency during cold months.
Business Insider quoted “The average reduction in PM2.5 – the fine particles in smog deemed most harmful to health – fell 15 percent during heavy pollution.”
