There is a mountain of unworn clothes in the driest desert on earth, large enough to be photographed from space. It grows by 39,000 tons a year and almost none of it will ever rot. The Atacama, in northern Chile, is a place where it may not rain for a decade. On its edge is a duty-free port called Iquique. Every year about 59,000 tons of clothing arrives there from Europe, America and Asia. It is last season's stock that never sold, and the bags people leave at charity shops. Dealers pick through it for anything they can resell across South America. Two thirds of it is worthless. Nobody will pay to ship it back out, so lorries drive it into the desert at night and tip it. The local landfill refuses to take it. The reason given is that the clothing does not biodegrade and is full of chemicals. Most of it is polyester, which is plastic, and in a place with no rain and no soil life it will lie there for centuries. Some of it is set alight, and the smoke drifts over a town of 100,000 people. In 2025 a Chilean court ruled that the dumps had done serious damage to the land. For most of history this could not have happened. Clothes were wool, linen and leather. They were worn out, handed down and patched, and at the very end a rag merchant paid for the scraps. In Yorkshire, from 1813, old woollens were shredded and spun into new cloth. Anything left went on the fields, where wool breaks down in months and feeds the grass. Nobody ever had to find a desert for worn-out wool. We invented a fabric that cannot die, and then we started making it to be thrown away.