Pollutionwatch: how skilful driving can reduce toxic fumes

Gentler acceleration and electric vehicles can reduce air pollution but walking or cycling are best

Local authorities are encouraging people not to leave their cars idling as tests show we can reduce air pollution by changing the way we drive.

Scientists in Utah measured exhaust emissions from a test car driven by volunteers over a set route. Contrary to the stereotypical view of the "boy racer", the study showed the older male participants were the most polluting drivers.