Cities are using walls of moss to tackle air pollution from traffic

Expensive moss walls are the latest trend to combat air pollution in major cities, but can a few square metres of plant matter really solve the problem?

Source:
https://www.newscientist.com/article/2213755-cities-are-using-walls-of-moss-to-tackle-air-pollution-from-traffic/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home