New Delhi is choking from smog as pollution levels reach new hazardous heights. That’s why a startup wants to build a 40-feet tall purifier in the middle of the capital that uses 48 fans and nine stages of filtration to pump out 1.3 million cubic meters of fresh air per hour—enough to provide clean air to nearly 75,000 people in a three-kilometre radius. The company behind the tower, which could run on solar energy, is already in talks with authorities to figure out how to implement the project.