| Title | Green Roof Systems within the Framework of a Circular Economy: A Scoping Review |
|---|---|
| ID_Doc | 28461 |
| Authors | Cervantes-Nájera, AL; Martínez-Rodríguez, MC; Campos-Villegas, LE; Bello-Yañez, XV; Brenneisen, S |
| Title | Green Roof Systems within the Framework of a Circular Economy: A Scoping Review |
| Year | 2024 |
| Published | Recycling, 9.0, 4 |
| Abstract | Green roofs are nature-based solutions with multiple benefits for the urban environment, but they have specific polymeric components in their structure that cause a carbon footprint. This scoping review highlights the technological advance in reusing or recycling alternative materials in green roof structures worldwide, making them a part of the circular economy (CE), and the search strategies to promote them to find whether there is a relation between them. The data were collected using the Web of Science from 2012 to 2022; we also used the Bibliometrix package to analyse research development by country and the development of the topic by author's keywords. We selected 68 open-access articles from twenty-four countries and reviewed the grey literature from the top five productive countries on this topic. Our findings show that CE strategies are performed nationally, while the green roof promotion ones are concentrated at the city level. The theme co-occurrence analysis showed that the substrate is the primary layer used with alternative materials, and the three materials most applied for it are rubber, biochar, and hydrogel. It was found that the primary purpose of optimising green roofs with alternative materials is to increase the ecosystem services they provide and indirectly function within the circular economy; still, there is a gap in estimating the environmental impact of doing this as a potential CE activity. |
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