A meeting of Merton council last month passed a Merton Liberal Democrat motion to cut engine idling to promote cleaner air.
The Liberal Democrat motion, which was passed unanimously, aims to improve air quality in the borough by introducing `No Idling' zones, particularly near schools.
Speaking after the meeting, Liberal Democrat Cllr Paul Kohler, said:
"Cutting air pollution is a public health issue, as well as an environmental one. Evidence shows that air pollution has links to various health conditions, and shorter life expectancy. That's why we must improve air quality in the borough, particularly round local schools.
"I'm delighted that our motion passed with cross-party support, and I look forward to Merton Council taking real action against idling to improve air quality."