Límite de palabras: responde exacto, no largo

Rooftop gardens are increasingly used in dense cities where ground-level green space is limited. A simple layer of plants can reduce heat inside the upper floors of a building, especially during long summer afternoons. However, architects warn that the roof must be checked before planting because wet soil can become heavy after rain. Some projects use lightweight containers instead of deep beds. These containers are easier to move during repairs and allow building managers to test different plant species. In one apartment block, herbs survived better than ornamental flowers because they needed less water and tolerated windy conditions. The gardens can also support social life. Residents who rarely met in lifts began sharing watering duties and organising short evening workshops. The building committee later added a small tool cupboard near the access door so volunteers would not have to carry equipment from their apartments.