Ilderton Primary has become the latest in the borough to plant a pollution barrier ‘green screen’ of ivy.
The playground is especially vulnerable to harmful pollutants as it at a lower level than the road.
The school has now planted ivy, evergreen trees and extra flowerbeds around the school’s perimeter.
Plants catch particles from car exhaust fumes in their leaves, forming a natural barrier than improves air quality.
Cllr Richard Livingstone, from Southwark Council, who is responsible for its work protecting the environment in the borough said: “There is growing evidence that projects like green screens around our schools can capture and reduce air pollution before it gets into our playgrounds, in this case by up to 50 per cent.
“I was really pleased to see the work and join the children from the school council to help plant up the new flower beds.”
Other schools to plant green screens include Goose Green Primary, in East Dulwich, also on a busy main road.