LEWISHAM Council says it will take action over poor air quality around Brockley, Crofton Park and Honor Oak Park.
Crofton Park and its borders with Forest Hill and Perry Vale will become an Air Quality Management Area.
Concerns centre mainly on Brockley Rise, Brockley Road and Honor Oak Park after studies showed levels of Nitrogen Dioxide - a gas mainly produced by vehicle exhausts which can irritate the lungs and lower resistance to respiratory infections - higher than EU guidelines.
A council spokesman said: "After consultation with residents, Lewisham Council has decided to also include the surrounding residential streets within the Air Quality Management Area as a precautionary measure, with 70 per cent of local people in support.
"Lewisham Council is now in the process of preparing an action plan to improve these conditions which will be published in the next 12 to 18 months."
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