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Manila's experiment with 'purifying paint'

18 April 2012 Last updated at 03:34 BST

In the Philippine capital Manila, which is one of the most polluted cities in the world, a paint which it is claimed can purify the air is being used.

A local company has come up with the paint and in partnership with the government it is trying to use it to clean up one of the city's most smog-choked roads.

Kate McGeown reports from Manila.