Recently, a new development for air filtration came to my attention. A German company, https://greencitysolutions.de, has developed a mixture of mosses and IT to produce cleaner air by natural methods.
Putney High Street is one of the most polluted areas in Britain. One of the contributors to this is the presence of a bus depot very nearby on one of the roads branching off the main thoroughfare.
Currently, there are few safety barriers on the street.
I propose that these mosses be housed in safety barriers and that these are installed down the high street and near the bus depot junction. If this pilot worked well in Putney, it could be applied to all British cities.