A Wimbledon primary school is among the top Eco-Schools performers, receiving the green flag award for the fourth time.
Dundonald Primary school was marked by judges from Keep Britain Tidy, on their ability to save energy, use renewable energy sources, clear littler, cut waste and save water.
The awards are internationally accredited and schools can scoop bronze, silver or the top award of a green flag.
Forty-four schools in Merton are registered with the Eco-Schools scheme, and Dundonald Primary, Poplar Primary, Aragon Primary and The Priory CofE schools have all received the top green flag.
Fiona Duffy, headteacher at Dudonald Primary said: "We are really thrilled to have been awarded the green flag for a fourth time, but it is really down to the enthusiasm and work of the children and teachers that keep it on the agenda and in the curriculum.
Improving children's understanding of the human impact upon the environment is essential in creating aware and responsible adults of the future. The Eco-Schools initiative is a good vehicle to support this."
Merton Council Cabinet Member for the Environment, Councillor Andrew Judge said: "Dundonald Primary can be really proud of this achievement.
"Environmental sustainability is clearly a national priority, but we can also make a significant impact at local level."