Anna Holligan with a "smog-eating" paving stone
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Smog-eating pavements: How they work

16 July 2013 Last updated at 12:05 BST

Scientists in the Netherlands have invented a pavement surface which they say can absorb pollution.

They believe the technology could help to reduce the environmental impact of cars and lorries worldwide.

Anna Holligan went to meet the 'Photocatalytic Pavements' inventor Professor Jos Brouwers to find out more.