Main Articles Enormous air purifier creates bubbles of clean air in polluted cities An innovative air purifier can create bubbles of safe, more breathable air in the world's most polluted cities. ExtremeTech https://www.extremetech.com/extreme/214637-enormous-air-purifier-creates-bubbles-of-clean-air-in-polluted-cities This skyscraper-sized air purifier is the world’s tallest The tower is about as tall as a 20-story building. NBC News https://www.nbcnews.com/mach/science/skyscraper-sized-air-purifier-world-s-tallest-ncna858436 This Tower Purifies a Million Cubic Feet of Air an Hour There’s a massive vacuum cleaner in the middle of a Rotterdam park and it’s sucking all the smog out of the air. WIRED https://www.wired.com/2015/09/tower-purifies-million-cubic-feet-air-hour/