Technique of ultra-extensive urban greening using mosses

The greening of impermeable surfaces, such as rooftops and unused concrete areas, offers multifaceted benefits to urban environments (biodiversity, temperature regulation, water retention, aesthetics). An innovative "ultra-extensive" greening technique, centered on promoting moss growth, provides a lightweight, cost-effective, and low-maintenance solution. The aim of this paper is to describe this technique and offer recommendations for a simple implementation method, providing an alternative to conventional greening practices.