This claim is true. This claim came from Nature, one of the world's most reputable and highly cited scientific journals. The authors of this article, titled "The environmental price of fast fashion," are certified researchers and professors who specialize in sustainability and economics, making them credible authors with little bias.
This article was published in 2020, so to expand this argument, I found a more recent primary source by Earth ORG, a non-profit environmental news and data platform. The article is titled "The Environmental Impact of Fast Fashion, Explained" and was published in February 2026. The article directly quoted a Quantis International 2018 report, which found that "the three main drivers of the industry’s global pollution impacts are dyeing and finishing (36%), yarn preparation (28%) and fiber production (15%)." They go on to argue that the industry dries up water resources and pollutes rivers and streams, while 85% of all textiles go to dumps each year. Even washing clothes releases 500,000 tons of microfibers into the ocean each year, the equivalent of 50 billion plastic bottles. They go on to share the shocking stat that this issue is only on the rise and will continue to project to 60% emissions from textile manufacturing alone, according to the UN Framework Convention on Climate Change. This data directly aligns with Nature's claims, making this a true statement that fast fashion is negatively farming our environment through carbon emissions, polluting oceans, and overall waste production.
For a secondary source, the Center for Biological Diversity published an online newspaper article on fast fashion titled "At What Cost? Unravelling the Harms of the Fast Fashion Industry." The Center for Biological Diversity is a highly credible non-profit (earning a four-star rating from the American Institute of Philanthropy) for using legal, scientific, and strategic actions to protect and educate the world about environmental concerns. They argue that: "the fast fashion industry is a significant contributor to the climate crisis, responsible for as much as 10% of global carbon dioxide emissions." They go on to elaborate fast fashion and not the entire fashion industry are at the forefront of this issue because they are designing thousands of new products weekly, often in current trends and cheap material made to be cheap but ultimately disposed of quickly.
For these three sources, their claims all align. Potential biases are minimal as all claims are scientifically backed and from reputable sources and highly credited authors. There are very few ways to contact these larger associations to ask specific questions, so no attempts were made.
https://www.nature.com/articles/s43017-020-0039-9
https://www.nature.com/natrevearthenviron/journal-information
https://earth.org/fast-fashions-detrimental-effect-on-the-environment/
https://www.carbontrust.com/sites/default/files/documents/resource/public/International%20Carbon%20Flows%20-%20Clothing%20-%20REPORT.pdf
https://www.biologicaldiversity.org/programs/population_and_sustainability/sustainability/fast_fashion