Let me explain
The plants are placed by sun exposure, evergreens on the southwest side and deciduous species on the northeast, and equal about 5 hectares of flat parkland concentrated on roughly 1,000 square metres. Staggered balconies jut out 3 metres with large planters so tree canopies can grow up to three storeys high, and every apartment has at least 2 trees, 8 shrubs and 40 plants. The greenery is a shared asset with central maintenance: the Flying Gardeners prune the trees from ropes twice a year, irrigation is managed remotely using groundwater and recycled greywater, and rooftop solar panels power the pumps. The trees lower indoor temperatures by 2 to 3 degrees Celsius (Stefano Boeri Architetti).