Urban Moss Wall Fights Smog

CityTree is an artificial wall of moss meant to reduce smog in urban environments:

https://www.curbed.com/2017/6/28/15885436/air-pollution-solutions-citytree-urban-greenery

http://mygoodplanet.com/moss-wall-cleaner-air-cities/

https://www.thebetterindia.com/120457/smog-air-pollution-delhi-citytree-moss-wall-green-city-solution-innovation/

Apparently, one such wall has the carbon-absorption of 275 trees. Might be a way for India to fight its  urban smog problem.