The Birmingham high street that cut air pollution
People living near a busy high street have taken part in an experiment to cut air pollution.
Kings Heath high street, in Birmingham, was the centre of a clean air day which involved closing parking bays, changes to traffic light sequencing and reductions to bus fares.
Pollution levels were monitored by experts and the results showed a substantial drop in nitrogen oxide levels.
The experiment was for a documentary Fighting For Air, presented by Dr Xand van Tulleken, which is available on BBC iPlayer.