Green walls, made of living vegetation, have now been installed at Hanover Square, Park Lane and Finsbury Circus.
These walls are part of a programme of measures that TfL and the Department for Transport are introducing across the capital to deliver cleaner air for London. The ivy plants that make up Crossrail’s green walls help purify the air by trapping harmful particulate matter (PM10) by between 10 and 20 per cent where applicable.This is part of the London Clean Air Fund financed by the Department for Transport (DfT) at the Mayor’s request, following the success of the original living wall at Finsbury Circus.
The gardens are maintained through a drip irrigation system which allows water to drip slowly to the roots of the plants and is not affected by hose pipe bans; investigation is also underway in terms of using recycled water to irrigate the plants.
The ‘living’ walls consist of ivy plants that thrive in the urban environment and will benefit biodiversity by providing new wildlife habitats, as well as reducing dust, pollen and carbon dioxide levels.