[…] Picture yourself with a trash bag of old clothes you’ve just cleaned out of your closet. You think you could get some money out of them, so you take them to a consignment or thrift store, or sell them via one of the new online equivalents, like ThredUp. But they’ll probably reject most of your old clothes, even the ones you paid dearly for, because of small flaws or no longer being in season. With fast fashion speeding up trends and shortening seasons, your clothing is quite likely dated if it’s more than a year old. Many secondhand stores will reject items from fast-fashion chains like Forever 21, H&M, Zara and Topshop. The inexpensive clothing is poor quality, with low resale value, and there’s just too much of it.
If you’re an American, your next step is likely to throw those old clothes in the trash. According to the Environmental Protection Agency (EPA), 84 percent of unwanted clothes in the United States in 2012 went into either a landfill or an incinerator.
When natural fibers, like cotton, linen and silk, or semi-synthetic fibers created from plant-based cellulose, like rayon, Tencel and modal, are buried in a landfill, in one sense they act like food waste, producing the potent greenhouse gas methane as they degrade. But unlike banana peels, you can’t compost old clothes, even if they’re made of natural materials. “Natural fibers go through a lot of unnatural processes on their way to becoming clothing,” says Jason Kibbey, CEO of the Sustainable Apparel Coalition. “They’ve been bleached, dyed, printed on, scoured in chemical baths.” Those chemicals can leach from the textiles and—in improperly sealed landfills—into groundwater. Burning the items in incinerators can release those toxins into the air.
Meanwhile, synthetic fibers, like polyester, nylon and acrylic, have the same environmental drawbacks, and because they are essentially a type of plastic made from petroleum, they will take hundreds of years, if not a thousand, to biodegrade.