In Madrid, plants turn a wall in the Paseo del Prada bright green.
Green walls are particularly useful in reducing pollution in street canyons, which are "a particular kind of oddity in that they tend to trap air within them, while over the city as a whole the air circulates freely," Thomas Pugh noted.
Because a green wall's vegetation is working with a much smaller volume of air in a street canyon, he added, it's more effective at absorbing or trapping the pollutants than if it was tackling a whole mass of air above the city.
However, Pugh cautioned, "we need more research to understand just how effective green walls can really be in real locations."
0 comments:
Post a Comment