Fashion's green future: measuring the GHG emission reduction in clothing reuse

The growing environmental concerns associated with the fast fashion industry, along with its significant greenhouse gas (GHG) emissions, have highlighted the need for sustainable practices, such as clothing reuse, to mitigate the impact of textile waste on the environment. This study proposes a GHG emission equation for clothing reuse, taking into account both lifespan extension and the number of reuse cycles. By incorporating lifespan extension and the displacement rate, which has traditionally been a primary focus, the study aims to provide a more accurate estimate of the GHG reduction effects of clothing reuse. It calculates GHG emission factors based on weight and item type, allowing for tailored applications. These factors can be used to develop specific regulations for particular types of clothing, provide consumers with relevant information, and assess the environmental impact of the clothing industry at a national level. The study presents an illustrative scenario in which approximately 3,173 t of clothing reuse could lead to a minimum GHG reduction of 65,344 t-CO₂eq/year (N = 1), depending on assumptions regarding displacement rates and lifespan extension. Although the reduction amount is relatively small, the study highlights the role of reuse as an effective GHG reduction strategy. It also emphasizes the importance of minimizing additional emissions from the reuse process, such as washing and transportation, and suggests that recycling be considered after a certain number of reuse cycles for further reductions.