Belfast comes SECOND in the UK for the most time spent in traffic congestion.

A few weeks ago - we were talking about congestion. Belfast comes second in the UK for the most time spent in traffic. It brought up the topic of air pollution, some of which is of course linked to vehicle emissions. Where are the problem areas - and what is it doing to YOUR health? Stephen spoke to Green Party Councillor Rachel Woods and Dr Mark Miller from the British Heart Foundation, one of the UK's leading research experts into air pollution.