World's first smog filtering tower goes on tour

A seven metre tall tower designed by Daan Roosegaarde filters dirty air, releasing bubbles of smog free air. Does it detract from tackling causes of air pollution?

The Dutch city of Rotterdam has opened the world's first smog-free tower.

Co-designed by Dutch artist Daan Roosegaarde, the seven-metre high tower sucks in dirty air like a giant vacuum cleaner. Ion technology then filters it, before returning bubbles of smog-free air through the tower's vents. It is able to clean 30,000 cubic metres of air an hour, according to Roosegaarde.