Smog tower

It was unveiled in September 2015 in Rotterdam[1] and later similar structures toured or were installed in[2] Beijing and Tianjin, China, Kraków, Poland,[3] Anyang, South Korea[4] and Abu Dhabi.

This project was led by Cao Jun Ji, a chemist at the Chinese Academy of Sciences' Key Laboratory of Aerosol Chemistry and Physics.

[6] “In the case of India, their population is more packed together, so the towers will be more effective in mitigating PM2.5 … At least during the next 10-15 years, they can use them to provide relief to residents while they invest in clean energy technology.”[15] —David Pui, Regents Professor and LM Fingerson/TSI Chair in Mechanical Engineering of the University of Minnesota, explained.

[26] It is different from Daan Roosegaarde's Smog Tower in that it won't depend on the ionization technique to clean the air.

[32] Noting that the Delhi tower would be powered by (mostly) coal-fired electricity,[dubious – discuss] Sunil Dahiya from India's Centre for Research on Energy and Clean Air has commented that "so we will only be adding to pollution elsewhere in the country".

[33] According to The Times, environmentalists said that "given the city[Delhi]'s size and the scale of its pollution, 2.5 million smog towers would be needed to clean its air".

[34] As a refute, "The objective is not to clear entire Delhi's air, it is to create special zones where people can breathe," Anwar Ali Khan, the engineer in charge of the project said.