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Transport corridorsIncorporating green roofs involves placing a vegetative layer such as plants, shrubs, grass, and/or trees on building rooftops.They are also called 'rooftop gardens' or 'eco roofs'.Green roofs can be installed as a thin layer (around 5 cm) of groundcover up to a thick layer (around 1m) of intensive vegetation and trees.The thickness depends on the chosen soil type, drainage system, and vegetation species. UHI and two, the high performance and growth of vegetation in humid tropics. Urban planningImplementation should be aided by the development of building codes and energy efficiency guidelines.Green roofs can be developed both in public and private buildings. State of the artNumerous studies have proven the benefits of green roofs.However, there is still insufficient studies that combine the UHI benefits with the reduction in building energy demand.Different authors have shown that the surface temperature of an individual green roof can be reduced by 15-45C compared to conventional or non-green roofs.Additionally, the nearby air temperature can be reduced by 2-5C.Reduction of energy consumption can be close to 10 per cent (Refahi and Talkhabi 2015), but could reach 80 per cent depending on the building type (Peng and Jim 2013).Additionally, if extensive use of green roof is undertaken in an urban area, air temperature at pedestrian level could be reduced by 0.5-1.7C(Peng and Jim 2013).
Ruefenacht et al. (Thu,) studied this question.