Green wall implementations also promote building cooling process by mitigating the problems towards management of rain water through trapping and retaining the rain water absorbed by the plants’ soil and the roots. This process cools the building structure. The heat from the direct exposure of sun and UV could not be trapped in the green wall plants for a longer period of time [11]. A collective effect of such system may help to cool down the urban temperature significantly while reducing the urban heat island effect in cities.