What happens if we throw our old clothes in the trash

https://www.huffingtonpost.com/entry/why-trashing-old-clothes-is-so-bad-for-the-environment_us_57f408f1e4b015995f2b93cb

https://learningenglish.voanews.com/a/are-clothes-causing-pollution/3806162.html

Are Your Clothes Causing Pollution? Yes, because some textiles contains plastic