Fast fashion’s real cost is paid outside the shop: in polluted rivers and overflowing landfills, in garment workers’ wages that do not cover rent, and in a culture that treats clothing as disposable.
Updated 3 October 2026 | The Mosaic Project, Mosaic Market, Chiang Mai | 9 minute read
A five-dollar T-shirt has a price, and it has a cost. The price is printed on the tag. The cost is spread across a river in West Java, a market in Accra, a factory floor in Dhaka and the back of your wardrobe, where the shirt will sit after its third wash, slightly out of shape and no longer worth keeping.
This guide follows that cost through three layers: what fast fashion does to the planet, what it asks of the people who make it, and what it changes in the rest of us.
Key findings
- Fashion is responsible for an estimated 2 to 8 percent of global carbon emissions, according to the UN Environment Programme.
- The equivalent of one garbage truck of textiles is landfilled or burned every second, and less than 1 percent of clothing material is recycled into new clothing (Ellen MacArthur Foundation).
- Around 40 percent of the secondhand clothing arriving at Kantamanto Market in Ghana leaves as waste (The Or Foundation).
- Bangladesh’s garment minimum wage rose to 12,500 taka (about US$114) a month in December 2023, still well short of what workers say they need to live.
- 138 million children were in child labour worldwide in 2024, 54 million of them in hazardous work (ILO and UNICEF, 2025).
What is fast fashion?
Fast fashion is a business model built on producing large volumes of trend-led clothing very quickly and selling it at low prices. Collections that once changed four times a year now change weekly, and some online retailers add thousands of new styles every day. Low prices are made possible by cheap synthetic materials, high-volume factories in low-wage countries, and costs that are pushed onto workers, communities and the environment instead of onto the price tag.
For a fuller definition, see What Is Fast Fashion and Why Should You Care?
The environmental cost of fast fashion
Textile waste: a garbage truck every second
The Ellen MacArthur Foundation, a UK charity that researches the circular economy, estimates that the equivalent of one garbage truck of textiles is landfilled or incinerated every second. Less than 1 percent of the material used to make clothing is recycled into new clothing.
The waste comes from three directions at once. Brands overproduce to keep shelves full of new styles. Cheap synthetic fabrics pill, stretch and tear within months. And marketing teaches us to see last season’s clothes as finished long before they are worn out.
Much of what is thrown away in wealthy countries does not disappear. It is exported. At Kantamanto Market in Accra, Ghana, one of the largest secondhand clothing markets in the world, The Or Foundation has documented that around 40 percent of the clothing arriving in bales leaves the market as waste. Much of it ends up on beaches, in open dumps and in the sea.
Water: dye, chemicals and microplastics
Clothing production is thirsty work. The WWF estimates that growing the fibre for a single conventional T-shirt can take around 2,700 litres of water, roughly what one person drinks in two and a half years.
Dyeing and finishing add a second burden. Untreated wastewater from textile factories has been linked to severe pollution in rivers across Asia. The Citarum River in West Java, Indonesia, lined with hundreds of textile factories, has been described by the BBC as one of the most polluted rivers in the world.
Then there are the fibres too small to see. Synthetic fabrics such as polyester and nylon shed microfibres every time they are washed. The International Union for Conservation of Nature estimates that the laundering of synthetic textiles accounts for about 35 percent of primary microplastics released into the world’s oceans. Our article on fast fashion and microplastic ocean pollution goes deeper.
Carbon: between 2 and 8 percent of global emissions
The UN Environment Programme puts fashion’s share of global carbon emissions at between 2 and 8 percent. The range is wide because supply chains are long and poorly reported, but every estimate is large. Emissions come from fossil-fuel-based fibres like polyester, from energy-hungry dyeing and finishing in coal-powered factories, from shipping goods across the world, and from burning unsold and discarded stock.
You may still see the older claim that fashion causes 10 percent of global emissions. UNEP revised its figure in 2022 to the 2 to 8 percent range used here.
The social cost of fast fashion
Garment workers’ wages
Most of the world’s clothing is sewn by women in South and Southeast Asia, often for wages that do not cover rent, food and school fees. In Bangladesh, the world’s second-largest clothing exporter, the garment minimum wage was raised to 12,500 taka, about US$114 a month, from December 2023 after weeks of protests in which workers were killed. Workers and unions said the new rate still fell far short of a living wage, with inflation running at around 9.5 percent (Business and Human Rights Resource Centre).
Unsafe factories
On 24 April 2013, the Rana Plaza building near Dhaka collapsed, killing 1,134 people, most of them garment workers, and injuring thousands more. Cracks had appeared in the walls the day before, and workers were told to return to their machines. The disaster led to the Bangladesh Accord on Fire and Building Safety, which brought real improvements, but safety elsewhere in the industry still depends on audits that workers say are easy to stage.
Child labour and forced labour
According to the latest joint estimate from the International Labour Organization and UNICEF, 138 million children were in child labour in 2024, and around 54 million of them did hazardous work. That is 20 million fewer than in 2020, but the world missed its goal of ending child labour by 2025. Children work at every stage of the textile chain, from picking fibre crops to spinning, sorting and finishing.
Forced labour is harder to count, but it runs through the same supply chains. Our article on fast fashion and modern slavery looks at how it hides there.
The ethical cost: what fast fashion changes in us
A disposable relationship with clothing
When a dress costs less than lunch, it is easy to treat it like lunch. Fast fashion depends on short attention: weekly drops, limited editions, the low hum of something new to want. The result is wardrobes full of clothes worn a handful of times, and a quiet loss of the older habits of mending, altering and keeping.
Greenwashing
As shoppers have grown more conscious, brands have learned to sound sustainable. Vague words like “eco”, “conscious” and “responsible”, a single recycled-polyester line inside a range of thousands, or a take-back bin at the till can all create an impression of change while the volume of production keeps rising. A useful test: ask how many new items a brand releases each year, who makes them, and what those people are paid. Brands with good answers usually publish them.
How to avoid supporting fast fashion
- Buy less, and keep what you buy longer. The most sustainable garment is usually the one already in your wardrobe.
- Choose secondhand first. Thrift shops, swaps and resale apps keep clothes in use. Mosaic Market hosts clothing and book swaps in Chiang Mai.
- Buy from makers you can name. Artisan and fair-wage brands tell you who made your clothes and what they were paid. See our vetted list of brands that are not fast fashion.
- Look for credible certifications, such as Fair Trade, GOTS (Global Organic Textile Standard) and OEKO-TEX, and be wary of claims without evidence.
- Mend, alter and care. Wash cool, line dry, sew on the button. Small habits add years to a garment.
For a full list of options, read 10 Alternatives to Fast Fashion.
Frequently asked questions
What are the hidden costs of fast fashion?
Environmental damage (textile waste, water pollution, microplastics and 2 to 8 percent of global carbon emissions), social harm (low wages, unsafe factories, child and forced labour) and ethical costs such as overconsumption and greenwashing.
How much textile waste does fast fashion create?
The Ellen MacArthur Foundation estimates that one garbage truck of textiles is landfilled or burned every second, and less than 1 percent of clothing material is recycled into new clothes.
What percentage of global emissions comes from fashion?
The UN Environment Programme estimates between 2 and 8 percent. The older 10 percent figure has been revised.
How much do garment workers in Bangladesh earn?
The minimum wage for garment workers in Bangladesh has been 12,500 taka a month (about US$114) since December 2023, which workers say is below a living wage.
What can I do instead of buying fast fashion?
Buy less, choose secondhand, buy from named artisan and fair-wage makers, look for credible certifications, and repair what you own.
Clothing with a name behind it
At Mosaic Market in Chiang Mai, every bag and garment comes from a maker we can name, paid fairly for their work. Thrive, our own label, employs women rebuilding their lives.
Meet the makersEvery figure in this article links to its original source. Last checked 3 October 2026 by the Mosaic Project team. Spotted something out of date? Email contact@mosaicmarket.co.
Methodology. Figures in this article come from UN agencies, research charities and established human rights monitors, linked below. Where an estimate has been revised, we use the latest published figure and say so.
Sources
- Ellen MacArthur Foundation, A New Textiles Economy: Redesigning Fashion’s Future
- The Or Foundation, Kantamanto Market research
- WWF, The impact of a T-shirt
- BBC News, Citarum River pollution
- IUCN, Primary Microplastics in the Oceans
- UN Environment Programme, UN Alliance for Sustainable Fashion addresses damage of fast fashion (updated 2022)
- Business and Human Rights Resource Centre, Bangladesh raises minimum wage following protests
- ILO and UNICEF, Despite progress, child labour still affects 138 million children globally (June 2025)
