Could a grid of giant filters help clean up Delhi's polluted air?

Thinking big in the fight against smog, architects have designed 100m-high pollution-absorbing towers for India's capital cityThe Indian capital regularly tops lists of the most polluted cities on earth and its residents even refer to the months when a confluence of events - crop burning, no rain, fireworks - leads to low visibility and breathability as "smog season".But a new concept by the Dubai-based architecture firm Znera imagines a solution embedded into the Delhi skyline: a network of giant towers that would absorb pollution and recycle it back into breathable air. Continue reading...