Fast fashion is cheap, poor quality, disposable clothing that is produced quickly and sold at low prices. It is not something completely new and it has been around for a long time. You don't even know it but most of your favorite stores like Zara, H&M, Primark, Forever 21 and Shein that have lately been very popular are considered fast fashion brands. This has always been a big problem and today even more because fast fashion is responsible for 10% of global carbon dioxide emission. So, next time you want to shop in one of these stores think twice.