IN-PERSON Lisbon Livable Cities. Section A

Abstract

Increased urban heat and flooding due to climate change can be mitigated by green construction, which also increases oxygen, acts as a carbon sink, and cleans the air (e.g., He, 2022). Although recycled materials in green construction have been studied (e.g., Neyestani, 2017), these studies rarely discuss the entire production chain (Musarat et al., 2022). To improve the value chain, it is vital to understand the experiences of different actors and their systemic roles. This case study analyses actors’ experiences in the textile circular economy regarding collecting and using organic fibres, as discarded textiles like wool and cotton, in regenerative green construction. Organic growing mats drive innovation for vertical, intermediate, and roof greening solutions in urban areas. Organic fibres in green construction mitigate warming and flooding and decrease environmental microplastics. We interviewed stakeholders in green construction at national and local levels and producers and users of organic growing mats. Their experiences show challenges and uncertainties in utilising organic textile fibres in green construction. Fibre mat producers do not believe that organic origin or domestic production adds value to growing substrates for which customers would pay. In contrast, green constructors prefer domestic and natural materials. The study highlights differing views that may be based on incorrect assumptions about consumer and production chain expectations. The need for urban greening is recognised, but material use needs holistic sustainability consideration. More research is needed on utilising organic recycled materials across the entire value chain, and new pilots with different solutions should be conducted.