Foreign roof garden reality

Quick answer：

Roof gardens in foreign countries are urban green spaces that are constructed on the roofs of buildings. They serve multiple purposes, including improving air quality, providing insulation, and creating additional green space in dense urban areas. They often feature plants, walkways, and seating areas, and can be seen in cities like Tokyo, New York, and Berlin. The design and implementation of roof gardens vary depending on factors like climate, building structure, and local regulations.