What is a smog tower? and how does it work??

DELHI GET'S IT'S FIRST-EVER AIR PURIFIER AT LAJPAT NAGAR CENTRAL MARKET :) IT'S CALLED THE SMOG TOWER PRODUCED BY GAUTAM GAMBHIR FOUNDATION :)
The first ‘smog tower’ in Delhi will become operational from Friday. The giant 20-ft-tall device has been installed at south Delhi’s popular Lajpat Nagar Central Market. The “smog tower” will purify air in Lajpat Nagar market, which sees an average footfall of nearly 15,000 people every day.

The equipment has been installed by the Traders Association Lajpat Nagar (TALN) with the help of east Delhi MP Gautam Gambhir. The facility will be inaugurated by the cricketer-turned-politician Gambhir at noon today.

General Secretary of the Traders Association Lajpat Nagar, Ashwani Marwah said that such initiatives were the need of the hour keeping in view alarming pollution levels in the city, which has also become a pollution capital