In one of the world’s most polluted cities, there’s a futuristic tower that sucks up smog, turns it into clean air, and filters out the smog particles so they can be turned into diamonds. Sound like sci-fi? It’s real — and there are smog diamonds out there to prove it. The tower is the brainchild of Dutch artist Daan Roosegaarde who looked out his hotel window in Beijing and realized that the smog was so thick, he couldn’t see the city.
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