Page 5 of 32 Rainwater harvesting A rainwater harvesting system is implemented in the building. The sky gardens also serve as water catchments and are ‘zero energy’ - irrigated by rainwater harvesting, with a gravity-fed drip system (Figure 7) powered by solar energy from photovoltaic cells on the roof. Harvested rainwater is used throughout the building’s water features (Figure 6). One of the uses of the harvested rainwater is for the watering of plants within the building. The building’s interior walls are comprised partially of green walls. The plants on the green walls are grown on soil bedding held together by wire mesh (Figure 7). Small tubes are connected to these wire mesh frames to provide a plant-watering system whereby droplets of water will be released onto the soil from time to time to keep the plants well hydrated in the air-conditioned environment (Figure 7). Figure 6: Water feature at lobby that use harvested rainwater. [Taken by: Wong Yoke Lin]