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Subtle green ‘background’ planting afforded a restorative effect.
Findings indicate that green walls have a direct effect on indoor comfort throughout the entire building, whereas the effect of green roofs is apparently primarily confined to the upper floor.
Moreover, the indirect effect of a green wall is greater, mainly due to the drop in infrared emissions resulting from a lower surface temperature.
The presented system effectively monitors and controls the green house parameters of crucial importance like temperature, humidity, soil moisture, and light intensity and CO2 gas.
underline the positive effect of green walls in summer and show moderate reduction of heat losses in winter.
This highlights the crucial mitigating effect of green spaces.
Of these gases, the contribution of carbon di oxide alone is found to be about 66% of the total magnitude of the Green House Effect.
Journal ArticleDOI
A. Raval, Veerabhadran Ramanathan 
14 Dec 1989-Nature
472 Citations
The rate of increase gives compelling evidence for the positive feedback between surface temperature, water vapour and the green-house effect; the magnitude of the feedback is consistent with that predicted by climate models.
We demonstrate how such methodologies can be used to reveal and explore the complex nature of the urban green volume.