Anti-smog bikes: could pedal power clean China's polluted air?

The bikes designed by Dutch artist Daan Roosegaarde would suck in polluted air, using positive ionisation to purify it, before releasing it back into the atmosphere

Dutch designer Daan Roosegaarde has announced the next phase of his Smog Free Project: a bike that sucks in polluted air and releases purified air in a cloud around the cyclist.

According to Roosegaarde, whose design firm Studio Roosegaarde has offices in both Rotterdam and Beijing, the idea for his Smog Free Project came just over three years ago, as he gazed out of his Beijing apartment's window. On a Saturday, the city skyline is visible; on weekdays, it's shrouded in smog.