A ring inlaid with a smog cub. An invention labeled “Smog Free Tower” is tested in public spaces at a media meeting in Beijing, capital of China on September 26, 2016. Created by Daan Roosegaarde, a 37-year-old Dutch artist and innovator, the seven-meter-high machine collects and processes pollutants before condensing them into a cube. The cubes can be used to make rings, according to Roosegaarde. The tower can clean 30,000 cubic meters of fine smog per hour and uses no more electricity than a water boiler. (Photo/CFP)
