A new life cycle assessment (LCA) of polyester released by Textile Exchange shows that the environmental footprint of the world’s most widely used fiber is driven largely by fossil fuel-based raw materials, underscoring the urgency for the textile industry to shift toward circular and low-carbon production systems.
The report, published in June 2026, provides one of the most comprehensive analyses to date of polyester’s environmental and social impacts, examining the fiber from raw material extraction through to production. It compares virgin polyester derived from petrochemicals with recycled polyester systems, while introducing an expanded “LCA+” framework that incorporates human rights and social considerations alongside traditional environmental metrics.
Polyester accounts for more than half of global fiber production, making its environmental performance a critical issue for brands, manufacturers and policymakers seeking to reduce the fashion industry’s carbon footprint.
The study identifies petrochemical inputs—particularly purified terephthalic acid (PTA) and monoethylene glycol (MEG)—as the dominant contributors to greenhouse gas emissions, energy consumption and resource depletion in virgin polyester production. These fossil-based inputs represent the single largest lever for reducing environmental impact, the report said.
Energy use is another key hotspot. Electricity and heat required during polymerization and fiber production significantly influence emissions, with outcomes varying widely depending on the energy mix. Facilities powered by coal-heavy grids show substantially higher impacts than those using renewable energy sources, highlighting the importance of energy transition in textile manufacturing hubs.
While recycled polyester is often positioned as a more sustainable alternative, the report cautions that it is not impact-free. The environmental performance of recycled systems depends heavily on collection, sorting and processing efficiency. Transport emissions and the type of recycling technology—mechanical or chemical—also play a significant role in determining overall impact.
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“The findings reinforce that how polyester is made matters more than the fiber itself,” Textile Exchange noted, emphasizing that production methods, geographic location and energy sources can lead to significant variations in environmental outcomes.
The report is notable for incorporating new regional data, particularly for Southeast Asia, which accounts for more than half of global polyester production. This addition provides a more accurate picture of real-world manufacturing conditions and is expected to improve the quality of sustainability assessments used by global brands.
Beyond environmental indicators such as climate change, water use, eutrophication and resource depletion, the study also evaluates social risks across the value chain. The LCA+ approach highlights labor and human rights considerations, especially in recycling systems where informal workforces are often involved.
Textile Exchange said the report is designed to support better decision-making across the industry by providing standardized, high-quality data that can be integrated into widely used tools and databases, including the Higg Materials Sustainability Index and ecoinvent.
However, the organization cautioned against using LCA data to make direct comparisons between different fibers, such as polyester and cotton, without considering broader system boundaries and use cases. Instead, it recommends a holistic approach that evaluates entire supply chains and emphasizes continuous improvement.
Industry stakeholders are encouraged to prioritize investments in recycling infrastructure, improve traceability and explore alternatives to fossil-based feedstocks. Scaling up circular systems, the report suggests, will be essential to reducing polyester’s long-term environmental impact.
The findings come as global apparel brands face mounting pressure from regulators and consumers to demonstrate measurable progress on sustainability targets. With polyester expected to remain a dominant fiber due to its cost and performance advantages, the challenge lies in decoupling its production from fossil resources.
Ultimately, the report concludes that transitioning to renewable energy, improving recycling systems and reducing reliance on virgin petrochemicals will be critical to aligning polyester production with climate goals.
As the textile industry moves toward a lower-carbon future, the study provides a crucial evidence base for shaping strategies and investments, signaling that meaningful change will depend not only on material choices, but on transforming how those materials are produced.
