Dutch artist and innovator Daan Roosegaarde holds the Smog Free Ring made of compressed smog particles...
Dutch artist and innovator Daan Roosegaarde holds the Smog Free Ring made of compressed smog particles collected by the world's largest smog vacuum cleaner as he presents his The Smog Free Project at D-751 art zone in Beijing September 29, 2016. The Smog Free Project consist of 7-meter tall the Smog Free Tower, the large air purifier that creates an area of clean air around it and the Smog Free Jewellery that are made of compressed smog particles. REUTERS/Damir Sagol