Smog-free Tower
In a city where smog routinely blankets the streets, a Dutch artist has come-up with a 7 mts metal structure that takes in smog and expels cleaner air. His smog-free tower unveiled recently on a small grassy lot in Beijing evoked a lot of response. Comprising of 45 silver plates, resembling partially open window-blinds, the tower contains an air-armful particles purifying machine that runs continuously with a slow hum and also takes care of harmful particles.