Green roofing refers to the practice of growing vegetation on rooftops, which can help improve energy efficiency and reduce urban heat. This type of roofing typically involves a waterproof membrane, a drainage system, and a growing medium to support plant life. In addition to enhancing insulation, green roofs can manage stormwater runoff, promote biodiversity, and improve air quality. They can be designed as extensive systems with low-maintenance plants or intensive systems that support a wider variety of vegetation, including shrubs and small trees.